TSTP Solution File: NUM377+1.020 by Z3---4.8.9.0
View Problem
- Process Solution
%------------------------------------------------------------------------------
% File : Z3---4.8.9.0
% Problem : NUM377+1.020 : TPTP v8.1.0. Released v3.2.0.
% Transfm : none
% Format : tptp
% Command : z3_tptp -proof -model -t:%d -file:%s
% Computer : n006.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 13:04:00 EDT 2022
% Result : Unsatisfiable 0.19s 0.55s
% Output : Proof 35.71s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.10/0.11 % Problem : NUM377+1.020 : TPTP v8.1.0. Released v3.2.0.
% 0.10/0.12 % Command : z3_tptp -proof -model -t:%d -file:%s
% 0.12/0.33 % Computer : n006.cluster.edu
% 0.12/0.33 % Model : x86_64 x86_64
% 0.12/0.33 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33 % Memory : 8042.1875MB
% 0.12/0.33 % OS : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33 % CPULimit : 300
% 0.12/0.33 % WCLimit : 300
% 0.12/0.33 % DateTime : Fri Sep 2 10:01:24 EDT 2022
% 0.12/0.33 % CPUTime :
% 0.12/0.33 Z3tptp [4.8.9.0] (c) 2006-20**. Microsoft Corp.
% 0.12/0.33 Usage: tptp [options] [-file:]file
% 0.12/0.33 -h, -? prints this message.
% 0.12/0.33 -smt2 print SMT-LIB2 benchmark.
% 0.12/0.33 -m, -model generate model.
% 0.12/0.33 -p, -proof generate proof.
% 0.12/0.33 -c, -core generate unsat core of named formulas.
% 0.12/0.33 -st, -statistics display statistics.
% 0.12/0.33 -t:timeout set timeout (in second).
% 0.12/0.33 -smt2status display status in smt2 format instead of SZS.
% 0.12/0.33 -check_status check the status produced by Z3 against annotation in benchmark.
% 0.12/0.33 -<param>:<value> configuration parameter and value.
% 0.12/0.33 -o:<output-file> file to place output in.
% 0.19/0.55 % SZS status Unsatisfiable
% 0.19/0.55 % SZS output start Proof
% 0.19/0.55 tff(tptp_fun_Y1_38_type, type, (
% 0.19/0.55 tptp_fun_Y1_38: $i)).
% 0.19/0.55 tff(tptp_fun_X1_39_type, type, (
% 0.19/0.55 tptp_fun_X1_39: $i)).
% 0.19/0.55 tff(sum_type, type, (
% 0.19/0.55 sum: ( $i * $i ) > $i)).
% 0.19/0.55 tff(succ_type, type, (
% 0.19/0.55 succ: $i > $i)).
% 0.19/0.55 tff(tptp_fun_Y0_40_type, type, (
% 0.19/0.55 tptp_fun_Y0_40: $i)).
% 0.19/0.55 tff(pred_type, type, (
% 0.19/0.55 pred: $i > $i)).
% 0.19/0.55 tff(tptp_fun_X0_41_type, type, (
% 0.19/0.55 tptp_fun_X0_41: $i)).
% 0.19/0.55 tff(n20_type, type, (
% 0.19/0.55 n20: $i)).
% 0.19/0.55 tff(n19_type, type, (
% 0.19/0.55 n19: $i)).
% 0.19/0.55 tff(n18_type, type, (
% 0.19/0.55 n18: $i)).
% 0.19/0.55 tff(n17_type, type, (
% 0.19/0.55 n17: $i)).
% 0.19/0.55 tff(n16_type, type, (
% 0.19/0.55 n16: $i)).
% 0.19/0.55 tff(n15_type, type, (
% 0.19/0.55 n15: $i)).
% 0.19/0.55 tff(n14_type, type, (
% 0.19/0.55 n14: $i)).
% 0.19/0.55 tff(n13_type, type, (
% 0.19/0.55 n13: $i)).
% 0.19/0.55 tff(n12_type, type, (
% 0.19/0.55 n12: $i)).
% 0.19/0.55 tff(n11_type, type, (
% 0.19/0.55 n11: $i)).
% 0.19/0.55 tff(n10_type, type, (
% 0.19/0.55 n10: $i)).
% 0.19/0.55 tff(n9_type, type, (
% 0.19/0.55 n9: $i)).
% 0.19/0.55 tff(n8_type, type, (
% 0.19/0.55 n8: $i)).
% 0.19/0.55 tff(n7_type, type, (
% 0.19/0.55 n7: $i)).
% 0.19/0.55 tff(n6_type, type, (
% 0.19/0.55 n6: $i)).
% 0.19/0.55 tff(n5_type, type, (
% 0.19/0.55 n5: $i)).
% 0.19/0.55 tff(n4_type, type, (
% 0.19/0.55 n4: $i)).
% 0.19/0.55 tff(n3_type, type, (
% 0.19/0.55 n3: $i)).
% 0.19/0.55 tff(n2_type, type, (
% 0.19/0.55 n2: $i)).
% 0.19/0.55 tff(n1_type, type, (
% 0.19/0.55 n1: $i)).
% 0.19/0.55 tff(n0_type, type, (
% 0.19/0.55 n0: $i)).
% 0.19/0.55 tff(tptp_fun_Y2_36_type, type, (
% 0.19/0.55 tptp_fun_Y2_36: $i)).
% 0.19/0.55 tff(tptp_fun_X2_37_type, type, (
% 0.19/0.55 tptp_fun_X2_37: $i)).
% 0.19/0.55 tff(tptp_fun_Y3_34_type, type, (
% 0.19/0.55 tptp_fun_Y3_34: $i)).
% 0.19/0.55 tff(tptp_fun_X3_35_type, type, (
% 0.19/0.55 tptp_fun_X3_35: $i)).
% 0.19/0.55 tff(tptp_fun_Y4_32_type, type, (
% 0.19/0.55 tptp_fun_Y4_32: $i)).
% 0.19/0.55 tff(tptp_fun_X4_33_type, type, (
% 0.19/0.55 tptp_fun_X4_33: $i)).
% 0.19/0.55 tff(tptp_fun_Y5_30_type, type, (
% 0.19/0.55 tptp_fun_Y5_30: $i)).
% 0.19/0.55 tff(tptp_fun_X5_31_type, type, (
% 0.19/0.55 tptp_fun_X5_31: $i)).
% 0.19/0.55 tff(tptp_fun_Y6_28_type, type, (
% 0.19/0.55 tptp_fun_Y6_28: $i)).
% 0.19/0.55 tff(tptp_fun_X6_29_type, type, (
% 0.19/0.55 tptp_fun_X6_29: $i)).
% 0.19/0.55 tff(tptp_fun_Y7_26_type, type, (
% 0.19/0.55 tptp_fun_Y7_26: $i)).
% 0.19/0.55 tff(tptp_fun_X7_27_type, type, (
% 0.19/0.55 tptp_fun_X7_27: $i)).
% 0.19/0.55 tff(tptp_fun_Y8_24_type, type, (
% 0.19/0.55 tptp_fun_Y8_24: $i)).
% 0.19/0.55 tff(tptp_fun_X8_25_type, type, (
% 0.19/0.55 tptp_fun_X8_25: $i)).
% 0.19/0.55 tff(tptp_fun_Y9_22_type, type, (
% 0.19/0.55 tptp_fun_Y9_22: $i)).
% 0.19/0.55 tff(tptp_fun_X9_23_type, type, (
% 0.19/0.55 tptp_fun_X9_23: $i)).
% 0.19/0.55 tff(tptp_fun_Y10_20_type, type, (
% 0.19/0.55 tptp_fun_Y10_20: $i)).
% 0.19/0.55 tff(tptp_fun_X10_21_type, type, (
% 0.19/0.55 tptp_fun_X10_21: $i)).
% 0.19/0.55 tff(tptp_fun_Y11_18_type, type, (
% 0.19/0.55 tptp_fun_Y11_18: $i)).
% 0.19/0.55 tff(tptp_fun_X11_19_type, type, (
% 0.19/0.55 tptp_fun_X11_19: $i)).
% 0.19/0.55 tff(tptp_fun_Y12_16_type, type, (
% 0.19/0.55 tptp_fun_Y12_16: $i)).
% 0.19/0.55 tff(tptp_fun_X12_17_type, type, (
% 0.19/0.55 tptp_fun_X12_17: $i)).
% 0.19/0.55 tff(tptp_fun_Y13_14_type, type, (
% 0.19/0.55 tptp_fun_Y13_14: $i)).
% 0.19/0.55 tff(tptp_fun_X13_15_type, type, (
% 0.19/0.55 tptp_fun_X13_15: $i)).
% 0.19/0.55 tff(tptp_fun_Y14_12_type, type, (
% 0.19/0.55 tptp_fun_Y14_12: $i)).
% 0.19/0.55 tff(tptp_fun_X14_13_type, type, (
% 0.19/0.55 tptp_fun_X14_13: $i)).
% 0.19/0.55 tff(tptp_fun_Y15_10_type, type, (
% 0.19/0.55 tptp_fun_Y15_10: $i)).
% 0.19/0.55 tff(tptp_fun_X15_11_type, type, (
% 0.19/0.55 tptp_fun_X15_11: $i)).
% 0.19/0.55 tff(tptp_fun_Y16_8_type, type, (
% 0.19/0.55 tptp_fun_Y16_8: $i)).
% 0.19/0.55 tff(tptp_fun_X16_9_type, type, (
% 0.19/0.55 tptp_fun_X16_9: $i)).
% 0.19/0.55 tff(tptp_fun_Y17_6_type, type, (
% 0.19/0.55 tptp_fun_Y17_6: $i)).
% 0.19/0.55 tff(tptp_fun_X17_7_type, type, (
% 0.19/0.55 tptp_fun_X17_7: $i)).
% 0.19/0.55 tff(tptp_fun_Y18_4_type, type, (
% 0.19/0.55 tptp_fun_Y18_4: $i)).
% 0.19/0.55 tff(tptp_fun_X18_5_type, type, (
% 0.19/0.55 tptp_fun_X18_5: $i)).
% 0.19/0.55 tff(tptp_fun_Y19_2_type, type, (
% 0.19/0.55 tptp_fun_Y19_2: $i)).
% 0.19/0.55 tff(tptp_fun_X19_3_type, type, (
% 0.19/0.55 tptp_fun_X19_3: $i)).
% 0.19/0.55 tff(tptp_fun_Y20_0_type, type, (
% 0.19/0.55 tptp_fun_Y20_0: $i)).
% 0.19/0.55 tff(tptp_fun_X20_1_type, type, (
% 0.19/0.55 tptp_fun_X20_1: $i)).
% 0.19/0.55 tff(1,plain,
% 0.19/0.55 (((succ(n0) = n1) & (succ(n1) = n2) & (succ(n2) = n3) & (succ(n3) = n4) & (succ(n4) = n5) & (succ(n5) = n6) & (succ(n6) = n7) & (succ(n7) = n8) & (succ(n8) = n9) & (succ(n9) = n10) & (succ(n10) = n11) & (succ(n11) = n12) & (succ(n12) = n13) & (succ(n13) = n14) & (succ(n14) = n15) & (succ(n15) = n16) & (succ(n16) = n17) & (succ(n17) = n18) & (succ(n18) = n19) & (succ(n19) = n20) & (succ(n20) = n0) & (pred(n0) = n20) & (pred(n1) = n0) & (pred(n2) = n1) & (pred(n3) = n2) & (pred(n4) = n3) & (pred(n5) = n4) & (pred(n6) = n5) & (pred(n7) = n6) & (pred(n8) = n7) & (pred(n9) = n8) & (pred(n10) = n9) & (pred(n11) = n10) & (pred(n12) = n11) & (pred(n13) = n12) & (pred(n14) = n13) & (pred(n15) = n14) & (pred(n16) = n15) & (pred(n17) = n16) & (pred(n18) = n17) & (pred(n19) = n18) & (pred(n20) = n19) & (sum(n0, n0) = n0) & (sum(n0, n1) = n1) & (sum(n0, n2) = n2) & (sum(n0, n3) = n3) & (sum(n0, n4) = n4) & (sum(n0, n5) = n5) & (sum(n0, n6) = n6) & (sum(n0, n7) = n7) & (sum(n0, n8) = n8) & (sum(n0, n9) = n9) & (sum(n0, n10) = n10) & (sum(n0, n11) = n11) & (sum(n0, n12) = n12) & (sum(n0, n13) = n13) & (sum(n0, n14) = n14) & (sum(n0, n15) = n15) & (sum(n0, n16) = n16) & (sum(n0, n17) = n17) & (sum(n0, n18) = n18) & (sum(n0, n19) = n19) & (sum(n0, n20) = n20) & (sum(n1, n0) = n1) & (sum(n1, n1) = n2) & (sum(n1, n2) = n3) & (sum(n1, n3) = n4) & (sum(n1, n4) = n5) & (sum(n1, n5) = n6) & (sum(n1, n6) = n7) & (sum(n1, n7) = n8) & (sum(n1, n8) = n9) & (sum(n1, n9) = n10) & (sum(n1, n10) = n11) & (sum(n1, n11) = n12) & (sum(n1, n12) = n13) & (sum(n1, n13) = n14) & (sum(n1, n14) = n15) & (sum(n1, n15) = n16) & (sum(n1, n16) = n17) & (sum(n1, n17) = n18) & (sum(n1, n18) = n19) & (sum(n1, n19) = n20) & (sum(n1, n20) = n0) & (sum(n2, n0) = n2) & (sum(n2, n1) = n3) & (sum(n2, n2) = n4) & (sum(n2, n3) = n5) & (sum(n2, n4) = n6) & (sum(n2, n5) = n7) & (sum(n2, n6) = n8) & (sum(n2, n7) = n9) & (sum(n2, n8) = n10) & (sum(n2, n9) = n11) & (sum(n2, n10) = n12) & (sum(n2, n11) = n13) & (sum(n2, n12) = n14) & (sum(n2, n13) = n15) & (sum(n2, n14) = n16) & (sum(n2, n15) = n17) & (sum(n2, n16) = n18) & (sum(n2, n17) = n19) & (sum(n2, n18) = n20) & (sum(n2, n19) = n0) & (sum(n2, n20) = n1) & (sum(n3, n0) = n3) & (sum(n3, n1) = n4) & (sum(n3, n2) = n5) & (sum(n3, n3) = n6) & (sum(n3, n4) = n7) & (sum(n3, n5) = n8) & (sum(n3, n6) = n9) & (sum(n3, n7) = n10) & (sum(n3, n8) = n11) & (sum(n3, n9) = n12) & (sum(n3, n10) = n13) & (sum(n3, n11) = n14) & (sum(n3, n12) = n15) & (sum(n3, n13) = n16) & (sum(n3, n14) = n17) & (sum(n3, n15) = n18) & (sum(n3, n16) = n19) & (sum(n3, n17) = n20) & (sum(n3, n18) = n0) & (sum(n3, n19) = n1) & (sum(n3, n20) = n2) & (sum(n4, n0) = n4) & (sum(n4, n1) = n5) & (sum(n4, n2) = n6) & (sum(n4, n3) = n7) & (sum(n4, n4) = n8) & (sum(n4, n5) = n9) & (sum(n4, n6) = n10) & (sum(n4, n7) = n11) & (sum(n4, n8) = n12) & (sum(n4, n9) = n13) & (sum(n4, n10) = n14) & (sum(n4, n11) = n15) & (sum(n4, n12) = n16) & (sum(n4, n13) = n17) & (sum(n4, n14) = n18) & (sum(n4, n15) = n19) & (sum(n4, n16) = n20) & (sum(n4, n17) = n0) & (sum(n4, n18) = n1) & (sum(n4, n19) = n2) & (sum(n4, n20) = n3) & (sum(n5, n0) = n5) & (sum(n5, n1) = n6) & (sum(n5, n2) = n7) & (sum(n5, n3) = n8) & (sum(n5, n4) = n9) & (sum(n5, n5) = n10) & (sum(n5, n6) = n11) & (sum(n5, n7) = n12) & (sum(n5, n8) = n13) & (sum(n5, n9) = n14) & (sum(n5, n10) = n15) & (sum(n5, n11) = n16) & (sum(n5, n12) = n17) & (sum(n5, n13) = n18) & (sum(n5, n14) = n19) & (sum(n5, n15) = n20) & (sum(n5, n16) = n0) & (sum(n5, n17) = n1) & (sum(n5, n18) = n2) & (sum(n5, n19) = n3) & (sum(n5, n20) = n4) & (sum(n6, n0) = n6) & (sum(n6, n1) = n7) & (sum(n6, n2) = n8) & (sum(n6, n3) = n9) & (sum(n6, n4) = n10) & (sum(n6, n5) = n11) & (sum(n6, n6) = n12) & (sum(n6, n7) = n13) & (sum(n6, n8) = n14) & (sum(n6, n9) = n15) & (sum(n6, n10) = n16) & (sum(n6, n11) = n17) & (sum(n6, n12) = n18) & (sum(n6, n13) = n19) & (sum(n6, n14) = n20) & (sum(n6, n15) = n0) & (sum(n6, n16) = n1) & (sum(n6, n17) = n2) & (sum(n6, n18) = n3) & (sum(n6, n19) = n4) & (sum(n6, n20) = n5) & (sum(n7, n0) = n7) & (sum(n7, n1) = n8) & (sum(n7, n2) = n9) & (sum(n7, n3) = n10) & (sum(n7, n4) = n11) & (sum(n7, n5) = n12) & (sum(n7, n6) = n13) & (sum(n7, n7) = n14) & (sum(n7, n8) = n15) & (sum(n7, n9) = n16) & (sum(n7, n10) = n17) & (sum(n7, n11) = n18) & (sum(n7, n12) = n19) & (sum(n7, n13) = n20) & (sum(n7, n14) = n0) & (sum(n7, n15) = n1) & (sum(n7, n16) = n2) & (sum(n7, n17) = n3) & (sum(n7, n18) = n4) & (sum(n7, n19) = n5) & (sum(n7, n20) = n6) & (sum(n8, n0) = n8) & (sum(n8, n1) = n9) & (sum(n8, n2) = n10) & (sum(n8, n3) = n11) & (sum(n8, n4) = n12) & (sum(n8, n5) = n13) & (sum(n8, n6) = n14) & (sum(n8, n7) = n15) & (sum(n8, n8) = n16) & (sum(n8, n9) = n17) & (sum(n8, n10) = n18) & (sum(n8, n11) = n19) & (sum(n8, n12) = n20) & (sum(n8, n13) = n0) & (sum(n8, n14) = n1) & (sum(n8, n15) = n2) & (sum(n8, n16) = n3) & (sum(n8, n17) = n4) & (sum(n8, n18) = n5) & (sum(n8, n19) = n6) & (sum(n8, n20) = n7) & (sum(n9, n0) = n9) & (sum(n9, n1) = n10) & (sum(n9, n2) = n11) & (sum(n9, n3) = n12) & (sum(n9, n4) = n13) & (sum(n9, n5) = n14) & (sum(n9, n6) = n15) & (sum(n9, n7) = n16) & (sum(n9, n8) = n17) & (sum(n9, n9) = n18) & (sum(n9, n10) = n19) & (sum(n9, n11) = n20) & (sum(n9, n12) = n0) & (sum(n9, n13) = n1) & (sum(n9, n14) = n2) & (sum(n9, n15) = n3) & (sum(n9, n16) = n4) & (sum(n9, n17) = n5) & (sum(n9, n18) = n6) & (sum(n9, n19) = n7) & (sum(n9, n20) = n8) & (sum(n10, n0) = n10) & (sum(n10, n1) = n11) & (sum(n10, n2) = n12) & (sum(n10, n3) = n13) & (sum(n10, n4) = n14) & (sum(n10, n5) = n15) & (sum(n10, n6) = n16) & (sum(n10, n7) = n17) & (sum(n10, n8) = n18) & (sum(n10, n9) = n19) & (sum(n10, n10) = n20) & (sum(n10, n11) = n0) & (sum(n10, n12) = n1) & (sum(n10, n13) = n2) & (sum(n10, n14) = n3) & (sum(n10, n15) = n4) & (sum(n10, n16) = n5) & (sum(n10, n17) = n6) & (sum(n10, n18) = n7) & (sum(n10, n19) = n8) & (sum(n10, n20) = n9) & (sum(n11, n0) = n11) & (sum(n11, n1) = n12) & (sum(n11, n2) = n13) & (sum(n11, n3) = n14) & (sum(n11, n4) = n15) & (sum(n11, n5) = n16) & (sum(n11, n6) = n17) & (sum(n11, n7) = n18) & (sum(n11, n8) = n19) & (sum(n11, n9) = n20) & (sum(n11, n10) = n0) & (sum(n11, n11) = n1) & (sum(n11, n12) = n2) & (sum(n11, n13) = n3) & (sum(n11, n14) = n4) & (sum(n11, n15) = n5) & (sum(n11, n16) = n6) & (sum(n11, n17) = n7) & (sum(n11, n18) = n8) & (sum(n11, n19) = n9) & (sum(n11, n20) = n10) & (sum(n12, n0) = n12) & (sum(n12, n1) = n13) & (sum(n12, n2) = n14) & (sum(n12, n3) = n15) & (sum(n12, n4) = n16) & (sum(n12, n5) = n17) & (sum(n12, n6) = n18) & (sum(n12, n7) = n19) & (sum(n12, n8) = n20) & (sum(n12, n9) = n0) & (sum(n12, n10) = n1) & (sum(n12, n11) = n2) & (sum(n12, n12) = n3) & (sum(n12, n13) = n4) & (sum(n12, n14) = n5) & (sum(n12, n15) = n6) & (sum(n12, n16) = n7) & (sum(n12, n17) = n8) & (sum(n12, n18) = n9) & (sum(n12, n19) = n10) & (sum(n12, n20) = n11) & (sum(n13, n0) = n13) & (sum(n13, n1) = n14) & (sum(n13, n2) = n15) & (sum(n13, n3) = n16) & (sum(n13, n4) = n17) & (sum(n13, n5) = n18) & (sum(n13, n6) = n19) & (sum(n13, n7) = n20) & (sum(n13, n8) = n0) & (sum(n13, n9) = n1) & (sum(n13, n10) = n2) & (sum(n13, n11) = n3) & (sum(n13, n12) = n4) & (sum(n13, n13) = n5) & (sum(n13, n14) = n6) & (sum(n13, n15) = n7) & (sum(n13, n16) = n8) & (sum(n13, n17) = n9) & (sum(n13, n18) = n10) & (sum(n13, n19) = n11) & (sum(n13, n20) = n12) & (sum(n14, n0) = n14) & (sum(n14, n1) = n15) & (sum(n14, n2) = n16) & (sum(n14, n3) = n17) & (sum(n14, n4) = n18) & (sum(n14, n5) = n19) & (sum(n14, n6) = n20) & (sum(n14, n7) = n0) & (sum(n14, n8) = n1) & (sum(n14, n9) = n2) & (sum(n14, n10) = n3) & (sum(n14, n11) = n4) & (sum(n14, n12) = n5) & (sum(n14, n13) = n6) & (sum(n14, n14) = n7) & (sum(n14, n15) = n8) & (sum(n14, n16) = n9) & (sum(n14, n17) = n10) & (sum(n14, n18) = n11) & (sum(n14, n19) = n12) & (sum(n14, n20) = n13) & (sum(n15, n0) = n15) & (sum(n15, n1) = n16) & (sum(n15, n2) = n17) & (sum(n15, n3) = n18) & (sum(n15, n4) = n19) & (sum(n15, n5) = n20) & (sum(n15, n6) = n0) & (sum(n15, n7) = n1) & (sum(n15, n8) = n2) & (sum(n15, n9) = n3) & (sum(n15, n10) = n4) & (sum(n15, n11) = n5) & (sum(n15, n12) = n6) & (sum(n15, n13) = n7) & (sum(n15, n14) = n8) & (sum(n15, n15) = n9) & (sum(n15, n16) = n10) & (sum(n15, n17) = n11) & (sum(n15, n18) = n12) & (sum(n15, n19) = n13) & (sum(n15, n20) = n14) & (sum(n16, n0) = n16) & (sum(n16, n1) = n17) & (sum(n16, n2) = n18) & (sum(n16, n3) = n19) & (sum(n16, n4) = n20) & (sum(n16, n5) = n0) & (sum(n16, n6) = n1) & (sum(n16, n7) = n2) & (sum(n16, n8) = n3) & (sum(n16, n9) = n4) & (sum(n16, n10) = n5) & (sum(n16, n11) = n6) & (sum(n16, n12) = n7) & (sum(n16, n13) = n8) & (sum(n16, n14) = n9) & (sum(n16, n15) = n10) & (sum(n16, n16) = n11) & (sum(n16, n17) = n12) & (sum(n16, n18) = n13) & (sum(n16, n19) = n14) & (sum(n16, n20) = n15) & (sum(n17, n0) = n17) & (sum(n17, n1) = n18) & (sum(n17, n2) = n19) & (sum(n17, n3) = n20) & (sum(n17, n4) = n0) & (sum(n17, n5) = n1) & (sum(n17, n6) = n2) & (sum(n17, n7) = n3) & (sum(n17, n8) = n4) & (sum(n17, n9) = n5) & (sum(n17, n10) = n6) & (sum(n17, n11) = n7) & (sum(n17, n12) = n8) & (sum(n17, n13) = n9) & (sum(n17, n14) = n10) & (sum(n17, n15) = n11) & (sum(n17, n16) = n12) & (sum(n17, n17) = n13) & (sum(n17, n18) = n14) & (sum(n17, n19) = n15) & (sum(n17, n20) = n16) & (sum(n18, n0) = n18) & (sum(n18, n1) = n19) & (sum(n18, n2) = n20) & (sum(n18, n3) = n0) & (sum(n18, n4) = n1) & (sum(n18, n5) = n2) & (sum(n18, n6) = n3) & (sum(n18, n7) = n4) & (sum(n18, n8) = n5) & (sum(n18, n9) = n6) & (sum(n18, n10) = n7) & (sum(n18, n11) = n8) & (sum(n18, n12) = n9) & (sum(n18, n13) = n10) & (sum(n18, n14) = n11) & (sum(n18, n15) = n12) & (sum(n18, n16) = n13) & (sum(n18, n17) = n14) & (sum(n18, n18) = n15) & (sum(n18, n19) = n16) & (sum(n18, n20) = n17) & (sum(n19, n0) = n19) & (sum(n19, n1) = n20) & (sum(n19, n2) = n0) & (sum(n19, n3) = n1) & (sum(n19, n4) = n2) & (sum(n19, n5) = n3) & (sum(n19, n6) = n4) & (sum(n19, n7) = n5) & (sum(n19, n8) = n6) & (sum(n19, n9) = n7) & (sum(n19, n10) = n8) & (sum(n19, n11) = n9) & (sum(n19, n12) = n10) & (sum(n19, n13) = n11) & (sum(n19, n14) = n12) & (sum(n19, n15) = n13) & (sum(n19, n16) = n14) & (sum(n19, n17) = n15) & (sum(n19, n18) = n16) & (sum(n19, n19) = n17) & (sum(n19, n20) = n18) & (sum(n20, n0) = n20) & (sum(n20, n1) = n0) & (sum(n20, n2) = n1) & (sum(n20, n3) = n2) & (sum(n20, n4) = n3) & (sum(n20, n5) = n4) & (sum(n20, n6) = n5) & (sum(n20, n7) = n6) & (sum(n20, n8) = n7) & (sum(n20, n9) = n8) & (sum(n20, n10) = n9) & (sum(n20, n11) = n10) & (sum(n20, n12) = n11) & (sum(n20, n13) = n12) & (sum(n20, n14) = n13) & (sum(n20, n15) = n14) & (sum(n20, n16) = n15) & (sum(n20, n17) = n16) & (sum(n20, n18) = n17) & (sum(n20, n19) = n18) & (sum(n20, n20) = n19) & ((X0!41 = n20) | (X0!41 = n19) | (X0!41 = n18) | (X0!41 = n17) | (X0!41 = n16) | (X0!41 = n15) | (X0!41 = n14) | (X0!41 = n13) | (X0!41 = n12) | (X0!41 = n11) | (X0!41 = n10) | (X0!41 = n9) | (X0!41 = n8) | (X0!41 = n7) | (X0!41 = n6) | (X0!41 = n5) | (X0!41 = n4) | (X0!41 = n3) | (X0!41 = n2) | (X0!41 = n1) | (X0!41 = n0)) & ((Y0!40 = n20) | (Y0!40 = n19) | (Y0!40 = n18) | (Y0!40 = n17) | (Y0!40 = n16) | (Y0!40 = n15) | (Y0!40 = n14) | (Y0!40 = n13) | (Y0!40 = n12) | (Y0!40 = n11) | (Y0!40 = n10) | (Y0!40 = n9) | (Y0!40 = n8) | (Y0!40 = n7) | (Y0!40 = n6) | (Y0!40 = n5) | (Y0!40 = n4) | (Y0!40 = n3) | (Y0!40 = n2) | (Y0!40 = n1) | (Y0!40 = n0)) & (X1!39 = sum(sum(pred(X0!41), succ(Y0!40)), sum(pred(Y0!40), succ(X0!41)))) & (Y1!38 = sum(sum(pred(X0!41), succ(X0!41)), sum(pred(Y0!40), succ(Y0!40)))) & (X2!37 = sum(sum(pred(X1!39), succ(Y1!38)), sum(pred(Y1!38), succ(X1!39)))) & (Y2!36 = sum(sum(pred(X1!39), succ(X1!39)), sum(pred(Y1!38), succ(Y1!38)))) & (X3!35 = sum(sum(pred(X2!37), succ(Y2!36)), sum(pred(Y2!36), succ(X2!37)))) & (Y3!34 = sum(sum(pred(X2!37), succ(X2!37)), sum(pred(Y2!36), succ(Y2!36)))) & (X4!33 = sum(sum(pred(X3!35), succ(Y3!34)), sum(pred(Y3!34), succ(X3!35)))) & (Y4!32 = sum(sum(pred(X3!35), succ(X3!35)), sum(pred(Y3!34), succ(Y3!34)))) & (X5!31 = sum(sum(pred(X4!33), succ(Y4!32)), sum(pred(Y4!32), succ(X4!33)))) & (Y5!30 = sum(sum(pred(X4!33), succ(X4!33)), sum(pred(Y4!32), succ(Y4!32)))) & (X6!29 = sum(sum(pred(X5!31), succ(Y5!30)), sum(pred(Y5!30), succ(X5!31)))) & (Y6!28 = sum(sum(pred(X5!31), succ(X5!31)), sum(pred(Y5!30), succ(Y5!30)))) & (X7!27 = sum(sum(pred(X6!29), succ(Y6!28)), sum(pred(Y6!28), succ(X6!29)))) & (Y7!26 = sum(sum(pred(X6!29), succ(X6!29)), sum(pred(Y6!28), succ(Y6!28)))) & (X8!25 = sum(sum(pred(X7!27), succ(Y7!26)), sum(pred(Y7!26), succ(X7!27)))) & (Y8!24 = sum(sum(pred(X7!27), succ(X7!27)), sum(pred(Y7!26), succ(Y7!26)))) & (X9!23 = sum(sum(pred(X8!25), succ(Y8!24)), sum(pred(Y8!24), succ(X8!25)))) & (Y9!22 = sum(sum(pred(X8!25), succ(X8!25)), sum(pred(Y8!24), succ(Y8!24)))) & (X10!21 = sum(sum(pred(X9!23), succ(Y9!22)), sum(pred(Y9!22), succ(X9!23)))) & (Y10!20 = sum(sum(pred(X9!23), succ(X9!23)), sum(pred(Y9!22), succ(Y9!22)))) & (X11!19 = sum(sum(pred(X10!21), succ(Y10!20)), sum(pred(Y10!20), succ(X10!21)))) & (Y11!18 = sum(sum(pred(X10!21), succ(X10!21)), sum(pred(Y10!20), succ(Y10!20)))) & (X12!17 = sum(sum(pred(X11!19), succ(Y11!18)), sum(pred(Y11!18), succ(X11!19)))) & (Y12!16 = sum(sum(pred(X11!19), succ(X11!19)), sum(pred(Y11!18), succ(Y11!18)))) & (X13!15 = sum(sum(pred(X12!17), succ(Y12!16)), sum(pred(Y12!16), succ(X12!17)))) & (Y13!14 = sum(sum(pred(X12!17), succ(X12!17)), sum(pred(Y12!16), succ(Y12!16)))) & (X14!13 = sum(sum(pred(X13!15), succ(Y13!14)), sum(pred(Y13!14), succ(X13!15)))) & (Y14!12 = sum(sum(pred(X13!15), succ(X13!15)), sum(pred(Y13!14), succ(Y13!14)))) & (X15!11 = sum(sum(pred(X14!13), succ(Y14!12)), sum(pred(Y14!12), succ(X14!13)))) & (Y15!10 = sum(sum(pred(X14!13), succ(X14!13)), sum(pred(Y14!12), succ(Y14!12)))) & (X16!9 = sum(sum(pred(X15!11), succ(Y15!10)), sum(pred(Y15!10), succ(X15!11)))) & (Y16!8 = sum(sum(pred(X15!11), succ(X15!11)), sum(pred(Y15!10), succ(Y15!10)))) & (X17!7 = sum(sum(pred(X16!9), succ(Y16!8)), sum(pred(Y16!8), succ(X16!9)))) & (Y17!6 = sum(sum(pred(X16!9), succ(X16!9)), sum(pred(Y16!8), succ(Y16!8)))) & (X18!5 = sum(sum(pred(X17!7), succ(Y17!6)), sum(pred(Y17!6), succ(X17!7)))) & (Y18!4 = sum(sum(pred(X17!7), succ(X17!7)), sum(pred(Y17!6), succ(Y17!6)))) & (X19!3 = sum(sum(pred(X18!5), succ(Y18!4)), sum(pred(Y18!4), succ(X18!5)))) & (Y19!2 = sum(sum(pred(X18!5), succ(X18!5)), sum(pred(Y18!4), succ(Y18!4)))) & (X20!1 = sum(sum(pred(X19!3), succ(Y19!2)), sum(pred(Y19!2), succ(X19!3)))) & (Y20!0 = sum(sum(pred(X19!3), succ(X19!3)), sum(pred(Y19!2), succ(Y19!2)))) & ((~(X20!1 = Y20!0)) | (~(X19!3 = Y19!2)) | (~(X18!5 = Y18!4)) | (~(X17!7 = Y17!6)) | (~(X16!9 = Y16!8)) | (~(X15!11 = Y15!10)) | (~(X14!13 = Y14!12)) | (~(X13!15 = Y13!14)) | (~(X12!17 = Y12!16)) | (~(X11!19 = Y11!18)) | (~(X10!21 = Y10!20)) | (~(X9!23 = Y9!22)) | (~(X8!25 = Y8!24)) | (~(X7!27 = Y7!26)) | (~(X6!29 = Y6!28)) | (~(X5!31 = Y5!30)) | (~(X4!33 = Y4!32)) | (~(X3!35 = Y3!34)) | (~(X2!37 = Y2!36)) | (~(X1!39 = Y1!38))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(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) & ((X0!41 = n20) | (X0!41 = n19) | (X0!41 = n18) | (X0!41 = n17) | (X0!41 = n16) | (X0!41 = n15) | (X0!41 = n14) | (X0!41 = n13) | (X0!41 = n12) | (X0!41 = n11) | (X0!41 = n10) | (X0!41 = n9) | (X0!41 = n8) | (X0!41 = n7) | (X0!41 = n6) | (X0!41 = n5) | (X0!41 = n4) | (X0!41 = n3) | (X0!41 = n2) | (X0!41 = n1) | (X0!41 = n0)) & ((Y0!40 = n20) | (Y0!40 = n19) | (Y0!40 = n18) | (Y0!40 = n17) | (Y0!40 = n16) | (Y0!40 = n15) | (Y0!40 = n14) | (Y0!40 = n13) | (Y0!40 = n12) | (Y0!40 = n11) | (Y0!40 = n10) | (Y0!40 = n9) | (Y0!40 = n8) | (Y0!40 = n7) | (Y0!40 = n6) | (Y0!40 = n5) | (Y0!40 = n4) | (Y0!40 = n3) | (Y0!40 = n2) | (Y0!40 = n1) | (Y0!40 = n0)) & (X1!39 = sum(sum(pred(X0!41), succ(Y0!40)), sum(pred(Y0!40), succ(X0!41)))) & (Y1!38 = sum(sum(pred(X0!41), succ(X0!41)), sum(pred(Y0!40), succ(Y0!40)))) & (X2!37 = sum(sum(pred(X1!39), succ(Y1!38)), sum(pred(Y1!38), succ(X1!39)))) & (Y2!36 = sum(sum(pred(X1!39), succ(X1!39)), sum(pred(Y1!38), succ(Y1!38)))) & (X3!35 = sum(sum(pred(X2!37), succ(Y2!36)), sum(pred(Y2!36), succ(X2!37)))) & (Y3!34 = sum(sum(pred(X2!37), succ(X2!37)), sum(pred(Y2!36), succ(Y2!36)))) & (X4!33 = sum(sum(pred(X3!35), succ(Y3!34)), sum(pred(Y3!34), succ(X3!35)))) & (Y4!32 = sum(sum(pred(X3!35), succ(X3!35)), sum(pred(Y3!34), succ(Y3!34)))) & (X5!31 = sum(sum(pred(X4!33), succ(Y4!32)), sum(pred(Y4!32), succ(X4!33)))) & (Y5!30 = sum(sum(pred(X4!33), succ(X4!33)), sum(pred(Y4!32), succ(Y4!32)))) & (X6!29 = sum(sum(pred(X5!31), succ(Y5!30)), sum(pred(Y5!30), succ(X5!31)))) & (Y6!28 = sum(sum(pred(X5!31), succ(X5!31)), sum(pred(Y5!30), succ(Y5!30)))) & (X7!27 = sum(sum(pred(X6!29), succ(Y6!28)), sum(pred(Y6!28), succ(X6!29)))) & (Y7!26 = sum(sum(pred(X6!29), succ(X6!29)), sum(pred(Y6!28), succ(Y6!28)))) & (X8!25 = sum(sum(pred(X7!27), succ(Y7!26)), sum(pred(Y7!26), succ(X7!27)))) & (Y8!24 = sum(sum(pred(X7!27), succ(X7!27)), sum(pred(Y7!26), succ(Y7!26)))) & (X9!23 = sum(sum(pred(X8!25), succ(Y8!24)), sum(pred(Y8!24), succ(X8!25)))) & (Y9!22 = sum(sum(pred(X8!25), succ(X8!25)), sum(pred(Y8!24), succ(Y8!24)))) & (X10!21 = sum(sum(pred(X9!23), succ(Y9!22)), sum(pred(Y9!22), succ(X9!23)))) & (Y10!20 = sum(sum(pred(X9!23), succ(X9!23)), sum(pred(Y9!22), succ(Y9!22)))) & (X11!19 = sum(sum(pred(X10!21), succ(Y10!20)), sum(pred(Y10!20), succ(X10!21)))) & (Y11!18 = sum(sum(pred(X10!21), succ(X10!21)), sum(pred(Y10!20), succ(Y10!20)))) & (X12!17 = sum(sum(pred(X11!19), succ(Y11!18)), sum(pred(Y11!18), succ(X11!19)))) & (Y12!16 = sum(sum(pred(X11!19), succ(X11!19)), sum(pred(Y11!18), succ(Y11!18)))) & (X13!15 = sum(sum(pred(X12!17), succ(Y12!16)), sum(pred(Y12!16), succ(X12!17)))) & (Y13!14 = sum(sum(pred(X12!17), succ(X12!17)), sum(pred(Y12!16), succ(Y12!16)))) & (X14!13 = sum(sum(pred(X13!15), succ(Y13!14)), sum(pred(Y13!14), succ(X13!15)))) & (Y14!12 = sum(sum(pred(X13!15), succ(X13!15)), sum(pred(Y13!14), succ(Y13!14)))) & (X15!11 = sum(sum(pred(X14!13), succ(Y14!12)), sum(pred(Y14!12), succ(X14!13)))) & (Y15!10 = sum(sum(pred(X14!13), succ(X14!13)), sum(pred(Y14!12), succ(Y14!12)))) & (X16!9 = sum(sum(pred(X15!11), succ(Y15!10)), sum(pred(Y15!10), succ(X15!11)))) & (Y16!8 = sum(sum(pred(X15!11), succ(X15!11)), sum(pred(Y15!10), succ(Y15!10)))) & (X17!7 = sum(sum(pred(X16!9), succ(Y16!8)), sum(pred(Y16!8), succ(X16!9)))) & (Y17!6 = sum(sum(pred(X16!9), succ(X16!9)), sum(pred(Y16!8), succ(Y16!8)))) & (X18!5 = sum(sum(pred(X17!7), succ(Y17!6)), sum(pred(Y17!6), succ(X17!7)))) & (Y18!4 = sum(sum(pred(X17!7), succ(X17!7)), sum(pred(Y17!6), succ(Y17!6)))) & (X19!3 = sum(sum(pred(X18!5), succ(Y18!4)), sum(pred(Y18!4), succ(X18!5)))) & (Y19!2 = sum(sum(pred(X18!5), succ(X18!5)), sum(pred(Y18!4), succ(Y18!4)))) & (X20!1 = sum(sum(pred(X19!3), succ(Y19!2)), sum(pred(Y19!2), succ(X19!3)))) & (Y20!0 = sum(sum(pred(X19!3), succ(X19!3)), sum(pred(Y19!2), succ(Y19!2)))) & ((~(X20!1 = Y20!0)) | (~(X19!3 = Y19!2)) | (~(X18!5 = Y18!4)) | (~(X17!7 = Y17!6)) | (~(X16!9 = Y16!8)) | (~(X15!11 = Y15!10)) | (~(X14!13 = Y14!12)) | (~(X13!15 = Y13!14)) | (~(X12!17 = Y12!16)) | (~(X11!19 = Y11!18)) | (~(X10!21 = Y10!20)) | (~(X9!23 = Y9!22)) | (~(X8!25 = Y8!24)) | (~(X7!27 = Y7!26)) | (~(X6!29 = Y6!28)) | (~(X5!31 = Y5!30)) | (~(X4!33 = Y4!32)) | (~(X3!35 = Y3!34)) | (~(X2!37 = Y2!36)) | (~(X1!39 = Y1!38))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(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)))),
% 0.19/0.60 inference(rewrite,[status(thm)],[])).
% 0.19/0.60 tff(2,plain,
% 0.19/0.60 (?[X0: $i, Y0: $i, X1: $i, Y1: $i, X2: $i, Y2: $i, X3: $i, Y3: $i, X4: $i, Y4: $i, X5: $i, Y5: $i, X6: $i, Y6: $i, X7: $i, Y7: $i, X8: $i, Y8: $i, X9: $i, Y9: $i, X10: $i, Y10: $i, X11: $i, Y11: $i, X12: $i, Y12: $i, X13: $i, Y13: $i, X14: $i, Y14: $i, X15: $i, Y15: $i, X16: $i, Y16: $i, X17: $i, Y17: $i, X18: $i, Y18: $i, X19: $i, Y19: $i, X20: $i, Y20: $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) & ((X0 = n20) | (X0 = n19) | (X0 = n18) | (X0 = n17) | (X0 = n16) | (X0 = n15) | (X0 = n14) | (X0 = n13) | (X0 = n12) | (X0 = n11) | (X0 = n10) | (X0 = n9) | (X0 = n8) | (X0 = n7) | (X0 = n6) | (X0 = n5) | (X0 = n4) | (X0 = n3) | (X0 = n2) | (X0 = n1) | (X0 = n0)) & ((Y0 = n20) | (Y0 = n19) | (Y0 = n18) | (Y0 = n17) | (Y0 = n16) | (Y0 = n15) | (Y0 = n14) | (Y0 = n13) | (Y0 = n12) | (Y0 = n11) | (Y0 = n10) | (Y0 = n9) | (Y0 = n8) | (Y0 = n7) | (Y0 = n6) | (Y0 = n5) | (Y0 = n4) | (Y0 = n3) | (Y0 = n2) | (Y0 = n1) | (Y0 = n0)) & (X1 = sum(sum(pred(X0), succ(Y0)), sum(pred(Y0), succ(X0)))) & (Y1 = sum(sum(pred(X0), succ(X0)), sum(pred(Y0), succ(Y0)))) & (X2 = sum(sum(pred(X1), succ(Y1)), sum(pred(Y1), succ(X1)))) & (Y2 = sum(sum(pred(X1), succ(X1)), sum(pred(Y1), succ(Y1)))) & (X3 = sum(sum(pred(X2), succ(Y2)), sum(pred(Y2), succ(X2)))) & (Y3 = sum(sum(pred(X2), succ(X2)), sum(pred(Y2), succ(Y2)))) & (X4 = sum(sum(pred(X3), succ(Y3)), sum(pred(Y3), succ(X3)))) & (Y4 = sum(sum(pred(X3), succ(X3)), sum(pred(Y3), succ(Y3)))) & (X5 = sum(sum(pred(X4), succ(Y4)), sum(pred(Y4), succ(X4)))) & (Y5 = sum(sum(pred(X4), succ(X4)), sum(pred(Y4), succ(Y4)))) & (X6 = sum(sum(pred(X5), succ(Y5)), sum(pred(Y5), succ(X5)))) & (Y6 = sum(sum(pred(X5), succ(X5)), sum(pred(Y5), succ(Y5)))) & (X7 = sum(sum(pred(X6), succ(Y6)), sum(pred(Y6), succ(X6)))) & (Y7 = sum(sum(pred(X6), succ(X6)), sum(pred(Y6), succ(Y6)))) & (X8 = sum(sum(pred(X7), succ(Y7)), sum(pred(Y7), succ(X7)))) & (Y8 = sum(sum(pred(X7), succ(X7)), sum(pred(Y7), succ(Y7)))) & (X9 = sum(sum(pred(X8), succ(Y8)), sum(pred(Y8), succ(X8)))) & (Y9 = sum(sum(pred(X8), succ(X8)), sum(pred(Y8), succ(Y8)))) & (X10 = sum(sum(pred(X9), succ(Y9)), sum(pred(Y9), succ(X9)))) & (Y10 = sum(sum(pred(X9), succ(X9)), sum(pred(Y9), succ(Y9)))) & (X11 = sum(sum(pred(X10), succ(Y10)), sum(pred(Y10), succ(X10)))) & (Y11 = sum(sum(pred(X10), succ(X10)), sum(pred(Y10), succ(Y10)))) & (X12 = sum(sum(pred(X11), succ(Y11)), sum(pred(Y11), succ(X11)))) & (Y12 = sum(sum(pred(X11), succ(X11)), sum(pred(Y11), succ(Y11)))) & (X13 = sum(sum(pred(X12), succ(Y12)), sum(pred(Y12), succ(X12)))) & (Y13 = sum(sum(pred(X12), succ(X12)), sum(pred(Y12), succ(Y12)))) & (X14 = sum(sum(pred(X13), succ(Y13)), sum(pred(Y13), succ(X13)))) & (Y14 = sum(sum(pred(X13), succ(X13)), sum(pred(Y13), succ(Y13)))) & (X15 = sum(sum(pred(X14), succ(Y14)), sum(pred(Y14), succ(X14)))) & (Y15 = sum(sum(pred(X14), succ(X14)), sum(pred(Y14), succ(Y14)))) & (X16 = sum(sum(pred(X15), succ(Y15)), sum(pred(Y15), succ(X15)))) & (Y16 = sum(sum(pred(X15), succ(X15)), sum(pred(Y15), succ(Y15)))) & (X17 = sum(sum(pred(X16), succ(Y16)), sum(pred(Y16), succ(X16)))) & (Y17 = sum(sum(pred(X16), succ(X16)), sum(pred(Y16), succ(Y16)))) & (X18 = sum(sum(pred(X17), succ(Y17)), sum(pred(Y17), succ(X17)))) & (Y18 = sum(sum(pred(X17), succ(X17)), sum(pred(Y17), succ(Y17)))) & (X19 = sum(sum(pred(X18), succ(Y18)), sum(pred(Y18), succ(X18)))) & (Y19 = sum(sum(pred(X18), succ(X18)), sum(pred(Y18), succ(Y18)))) & (X20 = sum(sum(pred(X19), succ(Y19)), sum(pred(Y19), succ(X19)))) & (Y20 = sum(sum(pred(X19), succ(X19)), sum(pred(Y19), succ(Y19)))) & ((~(X20 = Y20)) | (~(X19 = Y19)) | (~(X18 = Y18)) | (~(X17 = Y17)) | (~(X16 = Y16)) | (~(X15 = Y15)) | (~(X14 = Y14)) | (~(X13 = Y13)) | (~(X12 = Y12)) | (~(X11 = Y11)) | (~(X10 = Y10)) | (~(X9 = Y9)) | (~(X8 = Y8)) | (~(X7 = Y7)) | (~(X6 = Y6)) | (~(X5 = Y5)) | (~(X4 = Y4)) | (~(X3 = Y3)) | (~(X2 = Y2)) | (~(X1 = Y1))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(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))) <=> ?[X0: $i, Y0: $i, X1: $i, Y1: $i, X2: $i, Y2: $i, X3: $i, Y3: $i, X4: $i, Y4: $i, X5: $i, Y5: $i, X6: $i, Y6: $i, X7: $i, Y7: $i, X8: $i, Y8: $i, X9: $i, Y9: $i, X10: $i, Y10: $i, X11: $i, Y11: $i, X12: $i, Y12: $i, X13: $i, Y13: $i, X14: $i, Y14: $i, X15: $i, Y15: $i, X16: $i, Y16: $i, X17: $i, Y17: $i, X18: $i, Y18: $i, X19: $i, Y19: $i, X20: $i, Y20: $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) & ((X0 = n20) | (X0 = n19) | (X0 = n18) | (X0 = n17) | (X0 = n16) | (X0 = n15) | (X0 = n14) | (X0 = n13) | (X0 = n12) | (X0 = n11) | (X0 = n10) | (X0 = n9) | (X0 = n8) | (X0 = n7) | (X0 = n6) | (X0 = n5) | (X0 = n4) | (X0 = n3) | (X0 = n2) | (X0 = n1) | (X0 = n0)) & ((Y0 = n20) | (Y0 = n19) | (Y0 = n18) | (Y0 = n17) | (Y0 = n16) | (Y0 = n15) | (Y0 = n14) | (Y0 = n13) | (Y0 = n12) | (Y0 = n11) | (Y0 = n10) | (Y0 = n9) | (Y0 = n8) | (Y0 = n7) | (Y0 = n6) | (Y0 = n5) | (Y0 = n4) | (Y0 = n3) | (Y0 = n2) | (Y0 = n1) | (Y0 = n0)) & (X1 = sum(sum(pred(X0), succ(Y0)), sum(pred(Y0), succ(X0)))) & (Y1 = sum(sum(pred(X0), succ(X0)), sum(pred(Y0), succ(Y0)))) & (X2 = sum(sum(pred(X1), succ(Y1)), sum(pred(Y1), succ(X1)))) & (Y2 = sum(sum(pred(X1), succ(X1)), sum(pred(Y1), succ(Y1)))) & (X3 = sum(sum(pred(X2), succ(Y2)), sum(pred(Y2), succ(X2)))) & (Y3 = sum(sum(pred(X2), succ(X2)), sum(pred(Y2), succ(Y2)))) & (X4 = sum(sum(pred(X3), succ(Y3)), sum(pred(Y3), succ(X3)))) & (Y4 = sum(sum(pred(X3), succ(X3)), sum(pred(Y3), succ(Y3)))) & (X5 = sum(sum(pred(X4), succ(Y4)), sum(pred(Y4), succ(X4)))) & (Y5 = sum(sum(pred(X4), succ(X4)), sum(pred(Y4), succ(Y4)))) & (X6 = sum(sum(pred(X5), succ(Y5)), sum(pred(Y5), succ(X5)))) & (Y6 = sum(sum(pred(X5), succ(X5)), sum(pred(Y5), succ(Y5)))) & (X7 = sum(sum(pred(X6), succ(Y6)), sum(pred(Y6), succ(X6)))) & (Y7 = sum(sum(pred(X6), succ(X6)), sum(pred(Y6), succ(Y6)))) & (X8 = sum(sum(pred(X7), succ(Y7)), sum(pred(Y7), succ(X7)))) & (Y8 = sum(sum(pred(X7), succ(X7)), sum(pred(Y7), succ(Y7)))) & (X9 = sum(sum(pred(X8), succ(Y8)), sum(pred(Y8), succ(X8)))) & (Y9 = sum(sum(pred(X8), succ(X8)), sum(pred(Y8), succ(Y8)))) & (X10 = sum(sum(pred(X9), succ(Y9)), sum(pred(Y9), succ(X9)))) & (Y10 = sum(sum(pred(X9), succ(X9)), sum(pred(Y9), succ(Y9)))) & (X11 = sum(sum(pred(X10), succ(Y10)), sum(pred(Y10), succ(X10)))) & (Y11 = sum(sum(pred(X10), succ(X10)), sum(pred(Y10), succ(Y10)))) & (X12 = sum(sum(pred(X11), succ(Y11)), sum(pred(Y11), succ(X11)))) & (Y12 = sum(sum(pred(X11), succ(X11)), sum(pred(Y11), succ(Y11)))) & (X13 = sum(sum(pred(X12), succ(Y12)), sum(pred(Y12), succ(X12)))) & (Y13 = sum(sum(pred(X12), succ(X12)), sum(pred(Y12), succ(Y12)))) & (X14 = sum(sum(pred(X13), succ(Y13)), sum(pred(Y13), succ(X13)))) & (Y14 = sum(sum(pred(X13), succ(X13)), sum(pred(Y13), succ(Y13)))) & (X15 = sum(sum(pred(X14), succ(Y14)), sum(pred(Y14), succ(X14)))) & (Y15 = sum(sum(pred(X14), succ(X14)), sum(pred(Y14), succ(Y14)))) & (X16 = sum(sum(pred(X15), succ(Y15)), sum(pred(Y15), succ(X15)))) & (Y16 = sum(sum(pred(X15), succ(X15)), sum(pred(Y15), succ(Y15)))) & (X17 = sum(sum(pred(X16), succ(Y16)), sum(pred(Y16), succ(X16)))) & (Y17 = sum(sum(pred(X16), succ(X16)), sum(pred(Y16), succ(Y16)))) & (X18 = sum(sum(pred(X17), succ(Y17)), sum(pred(Y17), succ(X17)))) & (Y18 = sum(sum(pred(X17), succ(X17)), sum(pred(Y17), succ(Y17)))) & (X19 = sum(sum(pred(X18), succ(Y18)), sum(pred(Y18), succ(X18)))) & (Y19 = sum(sum(pred(X18), succ(X18)), sum(pred(Y18), succ(Y18)))) & (X20 = sum(sum(pred(X19), succ(Y19)), sum(pred(Y19), succ(X19)))) & (Y20 = sum(sum(pred(X19), succ(X19)), sum(pred(Y19), succ(Y19)))) & ((~(X20 = Y20)) | (~(X19 = Y19)) | (~(X18 = Y18)) | (~(X17 = Y17)) | (~(X16 = Y16)) | (~(X15 = Y15)) | (~(X14 = Y14)) | (~(X13 = Y13)) | (~(X12 = Y12)) | (~(X11 = Y11)) | (~(X10 = Y10)) | (~(X9 = Y9)) | (~(X8 = Y8)) | (~(X7 = Y7)) | (~(X6 = Y6)) | (~(X5 = Y5)) | (~(X4 = Y4)) | (~(X3 = Y3)) | (~(X2 = Y2)) | (~(X1 = Y1))) & (~(n0 = n1)) & (~(n0 = n2)) & (~(n0 = n3)) & (~(n0 = n4)) & (~(n0 = n5)) & (~(n0 = n6)) & (~(n0 = n7)) & (~(n0 = n8)) & (~(n0 = n9)) & (~(n0 = n10)) & (~(n0 = n11)) & (~(n0 = n12)) & (~(n0 = n13)) & (~(n0 = n14)) & (~(n0 = n15)) & (~(n0 = n16)) & (~(n0 = n17)) & (~(n0 = n18)) & (~(n0 = n19)) & (~(n0 = n20)) & (~(n1 = n2)) & (~(n1 = n3)) & (~(n1 = n4)) & (~(n1 = n5)) & (~(n1 = n6)) & (~(n1 = n7)) & (~(n1 = n8)) & (~(n1 = n9)) & (~(n1 = n10)) & (~(n1 = n11)) & (~(n1 = n12)) & (~(n1 = n13)) & (~(n1 = n14)) & (~(n1 = n15)) & (~(n1 = n16)) & (~(n1 = n17)) & (~(n1 = n18)) & (~(n1 = n19)) & (~(n1 = n20)) & (~(n2 = n3)) & (~(n2 = n4)) & (~(n2 = n5)) & (~(n2 = n6)) & (~(n2 = n7)) & (~(n2 = n8)) & (~(n2 = n9)) & (~(n2 = n10)) & (~(n2 = n11)) & (~(n2 = n12)) & (~(n2 = n13)) & (~(n2 = n14)) & (~(n2 = n15)) & (~(n2 = n16)) & (~(n2 = n17)) & (~(n2 = n18)) & (~(n2 = n19)) & (~(n2 = n20)) & (~(n3 = n4)) & (~(n3 = n5)) & (~(n3 = n6)) & (~(n3 = n7)) & (~(n3 = n8)) & (~(n3 = n9)) & (~(n3 = n10)) & (~(n3 = n11)) & (~(n3 = n12)) & (~(n3 = n13)) & (~(n3 = n14)) & (~(n3 = n15)) & (~(n3 = n16)) & (~(n3 = n17)) & (~(n3 = n18)) & (~(n3 = n19)) & (~(n3 = n20)) & (~(n4 = n5)) & (~(n4 = n6)) & (~(n4 = n7)) & (~(n4 = n8)) & (~(n4 = n9)) & (~(n4 = n10)) & (~(n4 = n11)) & (~(n4 = n12)) & (~(n4 = n13)) & (~(n4 = n14)) & (~(n4 = n15)) & (~(n4 = n16)) & (~(n4 = n17)) & (~(n4 = n18)) & (~(n4 = n19)) & (~(n4 = n20)) & (~(n5 = n6)) & (~(n5 = n7)) & (~(n5 = n8)) & (~(n5 = n9)) & (~(n5 = n10)) & (~(n5 = n11)) & (~(n5 = n12)) & (~(n5 = n13)) & (~(n5 = n14)) & (~(n5 = n15)) & (~(n5 = n16)) & (~(n5 = n17)) & (~(n5 = n18)) & (~(n5 = n19)) & (~(n5 = n20)) & (~(n6 = n7)) & (~(n6 = n8)) & (~(n6 = n9)) & (~(n6 = n10)) & (~(n6 = n11)) & (~(n6 = n12)) & (~(n6 = n13)) & (~(n6 = n14)) & (~(n6 = n15)) & (~(n6 = n16)) & (~(n6 = n17)) & (~(n6 = n18)) & (~(n6 = n19)) & (~(n6 = n20)) & (~(n7 = n8)) & (~(n7 = n9)) & (~(n7 = n10)) & (~(n7 = n11)) & (~(n7 = n12)) & (~(n7 = n13)) & (~(n7 = n14)) & (~(n7 = n15)) & (~(n7 = n16)) & (~(n7 = n17)) & (~(n7 = n18)) & (~(n7 = n19)) & (~(n7 = n20)) & (~(n8 = n9)) & (~(n8 = n10)) & (~(n8 = n11)) & (~(n8 = n12)) & (~(n8 = n13)) & (~(n8 = n14)) & (~(n8 = n15)) & (~(n8 = n16)) & (~(n8 = n17)) & (~(n8 = n18)) & (~(n8 = n19)) & (~(n8 = n20)) & (~(n9 = n10)) & (~(n9 = n11)) & (~(n9 = n12)) & (~(n9 = n13)) & (~(n9 = n14)) & (~(n9 = n15)) & (~(n9 = n16)) & (~(n9 = n17)) & (~(n9 = n18)) & (~(n9 = n19)) & (~(n9 = n20)) & (~(n10 = n11)) & (~(n10 = n12)) & (~(n10 = n13)) & (~(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)))),
% 0.52/0.67 inference(rewrite,[status(thm)],[])).
% 0.52/0.67 tff(3,plain,
% 0.52/0.67 (^[X0: $i, Y0: $i, X1: $i, Y1: $i, X2: $i, Y2: $i, X3: $i, Y3: $i, X4: $i, Y4: $i, X5: $i, Y5: $i, X6: $i, Y6: $i, X7: $i, Y7: $i, X8: $i, Y8: $i, X9: $i, Y9: $i, X10: $i, Y10: $i, X11: $i, Y11: $i, X12: $i, Y12: $i, X13: $i, Y13: $i, X14: $i, Y14: $i, X15: $i, Y15: $i, X16: $i, Y16: $i, X17: $i, Y17: $i, X18: $i, Y18: $i, X19: $i, Y19: $i, X20: $i, Y20: $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(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)) <