TSTP Solution File: GRP123-8.004 by Metis---2.4

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Metis---2.4
% Problem  : GRP123-8.004 : TPTP v8.1.0. Released v1.2.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : metis --show proof --show saturation %s

% Computer : n011.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  : 600s
% DateTime : Sat Jul 16 10:36:31 EDT 2022

% Result   : Satisfiable 3.46s 3.64s
% Output   : Saturation 3.58s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.03/0.12  % Problem  : GRP123-8.004 : TPTP v8.1.0. Released v1.2.0.
% 0.03/0.13  % Command  : metis --show proof --show saturation %s
% 0.14/0.34  % Computer : n011.cluster.edu
% 0.14/0.34  % Model    : x86_64 x86_64
% 0.14/0.34  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.14/0.34  % Memory   : 8042.1875MB
% 0.14/0.34  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.14/0.34  % CPULimit : 300
% 0.14/0.34  % WCLimit  : 600
% 0.14/0.34  % DateTime : Tue Jun 14 02:36:34 EDT 2022
% 0.14/0.34  % CPUTime  : 
% 0.14/0.35  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% 3.46/3.64  % SZS status Satisfiable for /export/starexec/sandbox2/benchmark/theBenchmark.p
% 3.46/3.64  
% 3.46/3.64  SZS output start Saturation for /export/starexec/sandbox2/benchmark/theBenchmark.p
% 3.46/3.64  |- next e_0 e_1
% 3.46/3.64  |- next e_1 e_2
% 3.46/3.64  |- next e_2 e_3
% 3.46/3.64  |- next e_3 e_4
% 3.46/3.64  |- greater e_1 e_0
% 3.46/3.64  |- greater e_2 e_0
% 3.46/3.64  |- greater e_3 e_0
% 3.46/3.64  |- greater e_4 e_0
% 3.46/3.64  |- greater e_2 e_1
% 3.46/3.64  |- greater e_3 e_1
% 3.46/3.64  |- greater e_4 e_1
% 3.46/3.64  |- greater e_3 e_2
% 3.46/3.64  |- greater e_4 e_2
% 3.46/3.64  |- greater e_4 e_3
% 3.46/3.64  |- ~cycle $X $Y \/ ~cycle $X $Z \/ $Y == $Z
% 3.46/3.64  |- ~group_element $X \/ cycle $X e_0 \/ cycle $X e_1 \/ cycle $X e_2 \/
% 3.46/3.64     cycle $X e_3
% 3.46/3.64  |- cycle e_4 e_0
% 3.46/3.64  |- ~cycle $W $Z \/ ~cycle $X $Y \/ ~greater $Y e_0 \/ ~next $X $W \/
% 3.46/3.64     ~next $Z $Z1 \/ $Y == $Z1
% 3.46/3.64  |- ~cycle $W $Z2 \/ ~cycle $X $Z1 \/ ~cycle $Y e_0 \/ ~greater $Y $X \/
% 3.46/3.64     ~greater $Z1 $Z2 \/ ~next $Y $W
% 3.46/3.64  |- ~cycle $X e_0 \/ ~greater $Y $X \/ ~product $X e_1 $Y
% 3.46/3.64  |- ~cycle $X $Y \/ ~greater $Y e_0 \/ ~next $X $X1 \/ ~product $X e_1 $Z \/
% 3.46/3.64     $Z == $X1
% 3.46/3.64  |- group_element e_1
% 3.46/3.64  |- group_element e_2
% 3.46/3.64  |- group_element e_3
% 3.46/3.64  |- group_element e_4
% 3.46/3.64  |- ~(e_1 == e_2)
% 3.46/3.64  |- ~(e_1 == e_3)
% 3.46/3.64  |- ~(e_1 == e_4)
% 3.46/3.64  |- ~(e_2 == e_1)
% 3.46/3.64  |- ~(e_2 == e_3)
% 3.46/3.64  |- ~(e_2 == e_4)
% 3.46/3.64  |- ~(e_3 == e_1)
% 3.46/3.64  |- ~(e_3 == e_2)
% 3.46/3.64  |- ~(e_3 == e_4)
% 3.46/3.64  |- ~(e_4 == e_1)
% 3.46/3.64  |- ~(e_4 == e_2)
% 3.46/3.64  |- ~(e_4 == e_3)
% 3.46/3.64  |- ~group_element $X \/ ~group_element $Y \/ product1 $X $Y e_1 \/
% 3.46/3.64     product1 $X $Y e_2 \/ product1 $X $Y e_3 \/ product1 $X $Y e_4
% 3.46/3.64  |- ~product1 $X $Y $W \/ ~product1 $X $Y $Z \/ $W == $Z
% 3.46/3.64  |- ~product1 $X $W $Y \/ ~product1 $X $Z $Y \/ $W == $Z
% 3.46/3.64  |- ~product1 $W $Y $X \/ ~product1 $Z $Y $X \/ $W == $Z
% 3.46/3.64  |- product1 $X $X $X
% 3.46/3.64  |- ~group_element $X \/ ~group_element $Y \/ product2 $X $Y e_1 \/
% 3.46/3.64     product2 $X $Y e_2 \/ product2 $X $Y e_3 \/ product2 $X $Y e_4
% 3.46/3.64  |- ~product2 $X $Y $W \/ ~product2 $X $Y $Z \/ $W == $Z
% 3.46/3.64  |- ~product2 $X $W $Y \/ ~product2 $X $Z $Y \/ $W == $Z
% 3.46/3.64  |- ~product2 $W $Y $X \/ ~product2 $Z $Y $X \/ $W == $Z
% 3.46/3.64  |- product2 $X $X $X
% 3.46/3.64  |- ~cycle $X $Y \/ ~greater $Y e_0 \/ ~next $X $X \/ ~next $Y $Z1 \/
% 3.46/3.64     $Y == $Z1
% 3.46/3.64  |- ~cycle $Z $Y \/ ~cycle $Z1 $Z \/ ~greater $Y e_0 \/ ~next $Z $Z1 \/
% 3.46/3.64     $Y == $Z1
% 3.46/3.64  |- ~cycle $X $Z1 \/ ~cycle $Y e_0 \/ ~greater $Y $X \/ ~greater $Z1 $Z1 \/
% 3.46/3.64     ~next $Y $X
% 3.46/3.64  |- ~cycle $W $Z2 \/ ~cycle $Z1 e_0 \/ ~cycle $Z2 $Z1 \/ ~greater $Z1 $Z2 \/
% 3.46/3.64     ~next $Z1 $W
% 3.46/3.64  |- ~cycle $Z1 $Z1 \/ ~cycle $Z1 e_0 \/ ~greater $Z1 $Z1 \/ ~next $Z1 $Z1
% 3.46/3.64  |- ~group_element $Y \/ product1 $Y $Y e_1 \/ product1 $Y $Y e_2 \/
% 3.46/3.64     product1 $Y $Y e_3 \/ product1 $Y $Y e_4
% 3.46/3.64  |- ~group_element $Y \/ product2 $Y $Y e_1 \/ product2 $Y $Y e_2 \/
% 3.46/3.64     product2 $Y $Y e_3 \/ product2 $Y $Y e_4
% 3.46/3.64  |- ~product1 $X $Y $Z1 \/ ~product1 $Z1 $Y $Z2 \/ product2 $Z2 $X $Y
% 3.46/3.64  |- ~product1 $Z2 $Y $Z2 \/ product2 $Z2 $Z2 $Y
% 3.46/3.64  |- $_8 == $_8
% 3.46/3.64  |- ~cycle e_4 $_15 \/ e_0 == $_15
% 3.46/3.64  |- ~cycle e_4 $_14 \/ $_14 == e_0
% 3.46/3.64  |- cycle e_1 e_0 \/ cycle e_1 e_1 \/ cycle e_1 e_2 \/ cycle e_1 e_3
% 3.46/3.64  |- ~cycle e_1 $Y \/ $Y == e_3 \/ cycle e_1 e_0 \/ cycle e_1 e_1 \/
% 3.46/3.64     cycle e_1 e_2
% 3.46/3.64  |- ~cycle e_1 $Z \/ e_3 == $Z \/ cycle e_1 e_0 \/ cycle e_1 e_1 \/
% 3.46/3.64     cycle e_1 e_2
% 3.46/3.64  |- ~product1 $_19 $_19 $_22 \/ $_19 == $_22
% 3.46/3.64  |- ~product1 $_22 $_22 $_19 \/ $_19 == $_22
% 3.46/3.64  |- ~product1 $_29 $_30 $_29 \/ $_29 == $_30
% 3.46/3.64  |- ~product1 $_29 $_27 $_29 \/ $_27 == $_29
% 3.46/3.64  |- ~product1 $_38 $_36 $_36 \/ $_36 == $_38
% 3.46/3.64  |- ~product1 $_35 $_36 $_36 \/ $_35 == $_36
% 3.46/3.64  |- ~product2 $_43 $_43 $_46 \/ $_43 == $_46
% 3.46/3.64  |- ~product2 $_46 $_46 $_43 \/ $_43 == $_46
% 3.46/3.64  |- ~product2 $_53 $_54 $_53 \/ $_53 == $_54
% 3.46/3.64  |- ~product2 $_53 $_51 $_53 \/ $_51 == $_53
% 3.46/3.64  |- ~product2 $_62 $_60 $_60 \/ $_60 == $_62
% 3.46/3.64  |- ~product2 $_59 $_60 $_60 \/ $_59 == $_60
% 3.46/3.64  |- ~product1 $_71 $_71 $_72 \/ product2 $_72 $_71 $_71
% 3.46/3.64  |- ~product1 $_69 $_72 $_72 \/ product2 $_72 $_69 $_72
% 3.46/3.64  |- ~cycle $_83 e_0 \/ ~greater e_0 e_0 \/ ~next $_83 $_83 \/ e_0 == e_1
% 3.46/3.64  |- ~cycle $_83 e_1 \/ ~next $_83 $_83
% 3.46/3.64  |- ~cycle $_83 e_2 \/ ~next $_83 $_83
% 3.46/3.64  |- ~cycle $_83 e_3 \/ ~next $_83 $_83
% 3.46/3.64  |- ~cycle e_0 $_90 \/ ~cycle e_1 e_0 \/ ~greater $_90 e_0 \/ $_90 == e_1
% 3.46/3.64  |- ~cycle e_1 $_90 \/ ~cycle e_2 e_1 \/ ~greater $_90 e_0 \/ $_90 == e_2
% 3.46/3.64  |- ~cycle e_3 $_90 \/ ~cycle e_4 e_3 \/ ~greater $_90 e_0 \/ $_90 == e_4
% 3.46/3.64  |- ~cycle e_1 e_1 \/ ~cycle e_2 e_1
% 3.46/3.64  |- ~cycle e_1 e_3 \/ ~cycle e_2 e_1
% 3.46/3.64  |- ~cycle e_1 e_4 \/ ~cycle e_2 e_1
% 3.46/3.64  |- ~cycle e_3 e_1 \/ ~cycle e_4 e_3
% 3.46/3.64  |- ~cycle e_0 e_2 \/ ~cycle e_1 e_0
% 3.46/3.64  |- ~cycle e_0 e_3 \/ ~cycle e_1 e_0
% 3.46/3.64  |- ~cycle e_0 e_4 \/ ~cycle e_1 e_0
% 3.46/3.64  |- ~cycle e_0 e_0 \/ ~cycle e_1 $_99 \/ ~greater $_99 $_99 \/
% 3.46/3.64     ~greater e_0 e_1
% 3.46/3.64  |- ~cycle e_1 e_0 \/ ~cycle e_2 $_99 \/ ~greater $_99 $_99 \/
% 3.46/3.64     ~greater e_1 e_2
% 3.46/3.64  |- ~cycle e_2 e_0 \/ ~cycle e_3 $_99 \/ ~greater $_99 $_99 \/
% 3.46/3.64     ~greater e_2 e_3
% 3.46/3.64  |- ~cycle e_3 e_0 \/ ~cycle e_4 $_99 \/ ~greater $_99 $_99 \/
% 3.46/3.64     ~greater e_3 e_4
% 3.46/3.64  |- ~cycle $_106 e_0 \/ ~cycle e_0 e_0 \/ ~cycle e_1 $_106 \/
% 3.46/3.64     ~greater e_0 $_106
% 3.46/3.64  |- ~cycle $_106 e_1 \/ ~cycle e_1 e_0 \/ ~cycle e_2 $_106 \/
% 3.46/3.64     ~greater e_1 $_106
% 3.46/3.64  |- ~cycle $_106 e_2 \/ ~cycle e_2 e_0 \/ ~cycle e_3 $_106 \/
% 3.46/3.64     ~greater e_2 $_106
% 3.46/3.64  |- ~cycle e_0 e_1 \/ ~cycle e_1 e_0 \/ ~cycle e_2 e_0
% 3.46/3.64  |- ~cycle e_0 e_3 \/ ~cycle e_3 e_0
% 3.46/3.64  |- ~group_element $_112 \/ product1 e_1 $_112 e_1 \/
% 3.46/3.64     product1 e_1 $_112 e_2 \/ product1 e_1 $_112 e_3 \/
% 3.46/3.64     product1 e_1 $_112 e_4
% 3.46/3.64  |- ~group_element $_112 \/ product1 e_2 $_112 e_1 \/
% 3.46/3.64     product1 e_2 $_112 e_2 \/ product1 e_2 $_112 e_3 \/
% 3.46/3.64     product1 e_2 $_112 e_4
% 3.46/3.64  |- ~group_element $_112 \/ product1 e_3 $_112 e_1 \/
% 3.46/3.64     product1 e_3 $_112 e_2 \/ product1 e_3 $_112 e_3 \/
% 3.46/3.64     product1 e_3 $_112 e_4
% 3.46/3.64  |- ~group_element $_112 \/ product1 e_4 $_112 e_1 \/
% 3.46/3.64     product1 e_4 $_112 e_2 \/ product1 e_4 $_112 e_3 \/
% 3.46/3.64     product1 e_4 $_112 e_4
% 3.46/3.64  |- ~group_element $_111 \/ product1 $_111 e_1 e_1 \/
% 3.46/3.64     product1 $_111 e_1 e_2 \/ product1 $_111 e_1 e_3 \/
% 3.46/3.64     product1 $_111 e_1 e_4
% 3.46/3.64  |- ~group_element $_111 \/ product1 $_111 e_2 e_1 \/
% 3.46/3.64     product1 $_111 e_2 e_2 \/ product1 $_111 e_2 e_3 \/
% 3.46/3.64     product1 $_111 e_2 e_4
% 3.46/3.64  |- ~group_element $_111 \/ product1 $_111 e_3 e_1 \/
% 3.46/3.64     product1 $_111 e_3 e_2 \/ product1 $_111 e_3 e_3 \/
% 3.46/3.64     product1 $_111 e_3 e_4
% 3.46/3.64  |- ~group_element $_111 \/ product1 $_111 e_4 e_1 \/
% 3.46/3.64     product1 $_111 e_4 e_2 \/ product1 $_111 e_4 e_3 \/
% 3.46/3.64     product1 $_111 e_4 e_4
% 3.46/3.64  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.46/3.64     product1 e_1 e_2 e_4
% 3.46/3.64  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.46/3.64     product1 e_1 e_3 e_4
% 3.46/3.64  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product1 e_1 e_4 e_3
% 3.46/3.64  |- ~product1 $X e_4 e_1 \/ product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/
% 3.46/3.64     product2 e_3 $X e_4
% 3.46/3.64  |- ~product1 $W e_4 e_3 \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 $Z e_4 e_3 \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 e_1 $W e_3 \/ $W == e_4 \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 e_1 $Z e_3 \/ e_4 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 e_1 e_4 $W \/ $W == e_3 \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 e_1 e_4 $Z \/ e_3 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 $X e_2 e_1 \/ product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/
% 3.46/3.64     product1 e_1 e_2 e_3 \/ product2 e_4 $X e_2
% 3.46/3.64  |- ~product1 $W e_2 e_4 \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.46/3.64     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.46/3.64  |- ~product1 $Z e_2 e_4 \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.46/3.64     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.46/3.64  |- ~product1 e_1 $W e_4 \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
% 3.46/3.64     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.46/3.64  |- ~product1 e_1 $Z e_4 \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.46/3.64     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.46/3.64  |- ~product1 e_1 e_2 $W \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.46/3.64     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.46/3.64  |- ~product1 e_1 e_2 $Z \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.46/3.64     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.46/3.64  |- ~product1 $X e_3 e_1 \/ product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/
% 3.46/3.64     product1 e_1 e_3 e_3 \/ product2 e_4 $X e_3
% 3.46/3.64  |- ~product1 $W e_3 e_4 \/ $W == e_1 \/ product1 e_1 e_3 e_1 \/
% 3.46/3.64     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.46/3.64  |- ~product1 $Z e_3 e_4 \/ e_1 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.46/3.64     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.46/3.64  |- ~product1 e_1 $W e_4 \/ $W == e_3 \/ product1 e_1 e_3 e_1 \/
% 3.46/3.64     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.46/3.64  |- ~product1 e_1 $Z e_4 \/ e_3 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.46/3.64     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.46/3.64  |- ~product1 e_1 e_3 $W \/ $W == e_4 \/ product1 e_1 e_3 e_1 \/
% 3.46/3.64     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.46/3.64  |- ~product1 e_1 e_3 $Z \/ e_4 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.46/3.64     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.46/3.64  |- product1 e_2 e_4 e_1 \/ product1 e_2 e_4 e_2 \/ product1 e_2 e_4 e_3
% 3.46/3.64  |- ~product1 $X e_4 e_2 \/ product1 e_2 e_4 e_1 \/ product1 e_2 e_4 e_2 \/
% 3.46/3.64     product2 e_3 $X e_4
% 3.46/3.64  |- ~product1 $W e_4 e_3 \/ $W == e_2 \/ product1 e_2 e_4 e_1 \/
% 3.46/3.64     product1 e_2 e_4 e_2
% 3.46/3.64  |- ~product1 $Z e_4 e_3 \/ e_2 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.46/3.64     product1 e_2 e_4 e_2
% 3.46/3.64  |- ~product1 e_2 $W e_3 \/ $W == e_4 \/ product1 e_2 e_4 e_1 \/
% 3.46/3.64     product1 e_2 e_4 e_2
% 3.46/3.64  |- ~product1 e_2 $Z e_3 \/ e_4 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.46/3.64     product1 e_2 e_4 e_2
% 3.46/3.64  |- ~product1 e_2 e_4 $W \/ $W == e_3 \/ product1 e_2 e_4 e_1 \/
% 3.46/3.64     product1 e_2 e_4 e_2
% 3.46/3.64  |- ~product1 e_2 e_4 $Z \/ e_3 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.46/3.64     product1 e_2 e_4 e_2
% 3.46/3.64  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product1 e_2 e_4 e_1
% 3.46/3.64  |- ~product1 $X e_4 e_2 \/ product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/
% 3.46/3.64     product2 e_1 $X e_4
% 3.46/3.64  |- ~product1 e_1 e_4 $Z2 \/ product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/
% 3.46/3.64     product2 $Z2 e_2 e_4
% 3.46/3.64  |- ~product1 $W e_4 e_1 \/ $W == e_2 \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 e_2 $W e_1 \/ $W == e_4 \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 e_2 e_4 $W \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- ~product1 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.46/3.64     product1 e_1 e_4 e_2
% 3.46/3.64  |- product1 e_3 e_4 e_1 \/ product1 e_3 e_4 e_2
% 3.46/3.64  |- ~product1 $X e_4 e_3 \/ product1 e_3 e_4 e_1 \/ product2 e_2 $X e_4
% 3.46/3.64  |- ~product1 e_2 e_4 $Z2 \/ product1 e_3 e_4 e_1 \/ product2 $Z2 e_3 e_4
% 3.46/3.64  |- ~product1 $W e_4 e_2 \/ $W == e_3 \/ product1 e_3 e_4 e_1
% 3.46/3.64  |- ~product1 $Z e_4 e_2 \/ e_3 == $Z \/ product1 e_3 e_4 e_1
% 3.46/3.64  |- ~product1 e_3 $W e_2 \/ $W == e_4 \/ product1 e_3 e_4 e_1
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% 3.50/3.65  |- ~product1 e_3 e_1 $W \/ $W == e_4 \/ product1 e_3 e_1 e_1 \/
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% 3.50/3.65  |- ~product1 e_3 e_1 $Z \/ e_4 == $Z \/ product1 e_3 e_1 e_1 \/
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% 3.50/3.65  |- ~product1 $Z e_2 e_4 \/ e_3 == $Z \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.65  |- ~product1 e_3 e_2 $Z \/ e_4 == $Z \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.65     product1 e_4 e_1 e_2
% 3.50/3.65  |- ~product1 $Z e_1 e_3 \/ e_4 == $Z \/ product1 e_4 e_1 e_1 \/
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% 3.50/3.65     product1 e_4 e_1 e_2
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% 3.50/3.65     product1 e_4 e_1 e_2
% 3.50/3.65  |- ~product1 e_4 e_1 $W \/ $W == e_3 \/ product1 e_4 e_1 e_1 \/
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% 3.50/3.65     product1 e_4 e_2 e_2
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% 3.50/3.65     product1 e_4 e_2 e_2
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% 3.50/3.65     product1 e_4 e_2 e_2
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% 3.50/3.66  |- ~product1 $Z e_2 e_1 \/ e_4 == $Z \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.66  |- ~product1 e_4 $W e_1 \/ $W == e_2 \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.66  |- ~product1 e_4 $Z e_1 \/ e_2 == $Z \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.66  |- ~product1 e_4 e_2 $W \/ $W == e_1 \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.66     product1 e_4 e_1 e_2
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% 3.50/3.66     product1 e_4 e_1 e_2
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% 3.50/3.66     product1 e_4 e_2 e_2
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% 3.50/3.66     product1 e_4 e_2 e_2
% 3.50/3.66  |- ~product2 e_3 e_1 $Z \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.66     product1 e_4 e_2 e_2
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% 3.50/3.66  |- ~product1 e_4 $Z e_2 \/ e_1 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.66     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_1 e_1
% 3.50/3.66  |- ~product1 e_4 e_1 $W \/ $W == e_2 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.66  |- ~product1 e_4 e_1 $Z \/ e_2 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.66     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_1 e_1
% 3.50/3.66  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.50/3.66     product1 e_2 e_3 e_1
% 3.50/3.66  |- ~product1 $X e_3 e_2 \/ product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/
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% 3.50/3.67     product2 e_2 e_4 e_2
% 3.50/3.67  |- ~product2 e_2 e_4 $W \/ $W == e_3 \/ product2 e_2 e_4 e_1 \/
% 3.50/3.67     product2 e_2 e_4 e_2
% 3.50/3.67  |- ~product2 e_2 e_4 $Z \/ e_3 == $Z \/ product2 e_2 e_4 e_1 \/
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% 3.50/3.67  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.67     product2 e_1 e_4 e_2
% 3.50/3.67  |- ~product2 $Z e_4 e_1 \/ e_2 == $Z \/ product2 e_1 e_4 e_1 \/
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% 3.50/3.67     product2 e_1 e_4 e_2
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% 3.50/3.67     product2 e_1 e_4 e_2
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% 3.50/3.67  |- ~product2 $Z e_1 e_4 \/ e_2 == $Z \/ product2 e_2 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 e_2 e_1 $W \/ $W == e_4 \/ product2 e_2 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 e_2 e_1 $Z \/ e_4 == $Z \/ product2 e_2 e_1 e_1 \/
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% 3.50/3.67     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3
% 3.50/3.67  |- ~product2 $Z e_1 e_4 \/ e_3 == $Z \/ product2 e_3 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 e_3 $W e_4 \/ $W == e_1 \/ product2 e_3 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 e_3 $Z e_4 \/ e_1 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.67     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3
% 3.50/3.67  |- ~product2 e_3 e_1 $W \/ $W == e_4 \/ product2 e_3 e_1 e_1 \/
% 3.50/3.67     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3
% 3.50/3.67  |- ~product2 e_3 e_1 $Z \/ e_4 == $Z \/ product2 e_3 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 $W e_2 e_4 \/ $W == e_3 \/ product2 e_3 e_2 e_1 \/
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% 3.50/3.67  |- ~product2 $Z e_2 e_4 \/ e_3 == $Z \/ product2 e_3 e_2 e_1 \/
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% 3.50/3.67  |- ~product2 e_3 $W e_4 \/ $W == e_2 \/ product2 e_3 e_2 e_1 \/
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% 3.50/3.67  |- ~product2 e_3 $Z e_4 \/ e_2 == $Z \/ product2 e_3 e_2 e_1 \/
% 3.50/3.67     product2 e_3 e_2 e_2 \/ product2 e_3 e_2 e_3
% 3.50/3.67  |- ~product2 e_3 e_2 $W \/ $W == e_4 \/ product2 e_3 e_2 e_1 \/
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% 3.50/3.67  |- ~product2 e_3 e_2 $Z \/ e_4 == $Z \/ product2 e_3 e_2 e_1 \/
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% 3.50/3.67  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1 \/
% 3.50/3.67     product2 e_3 e_1 e_2
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% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 $Z e_1 e_2 \/ e_3 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.67  |- ~product2 e_3 $W e_2 \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 $Z e_2 \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 e_1 $W \/ $W == e_2 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 e_1 $Z \/ e_2 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1 \/
% 3.50/3.67     product2 e_3 e_4 e_1
% 3.50/3.67  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.67     product2 e_1 e_4 e_2
% 3.50/3.67  |- ~product2 $W e_4 e_2 \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 $Z e_4 e_2 \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 e_1 $W e_2 \/ $W == e_4 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 e_1 $Z e_2 \/ e_4 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 e_1 e_4 $W \/ $W == e_2 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 e_1 e_4 $Z \/ e_2 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.67     product2 e_3 e_4 e_1
% 3.50/3.67  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.67     product1 e_1 e_4 e_2 \/ product2 e_1 e_4 e_1
% 3.50/3.67  |- product1 e_2 e_4 e_1 \/ product1 e_2 e_4 e_2 \/ product2 e_3 e_2 e_1
% 3.50/3.67  |- ~product2 $W e_2 e_1 \/ $W == e_3 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2
% 3.50/3.67  |- ~product2 $Z e_2 e_1 \/ e_3 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2
% 3.50/3.67  |- ~product2 e_3 $W e_1 \/ $W == e_2 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2
% 3.50/3.67  |- ~product2 e_3 $Z e_1 \/ e_2 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2
% 3.50/3.67  |- ~product2 e_3 e_2 $W \/ $W == e_1 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2
% 3.50/3.67  |- ~product2 e_3 e_2 $Z \/ e_1 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2
% 3.50/3.67  |- product2 e_4 e_1 e_1 \/ product2 e_4 e_1 e_2 \/ product2 e_4 e_1 e_3
% 3.50/3.67  |- ~product2 $W e_1 e_3 \/ $W == e_4 \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 $Z e_1 e_3 \/ e_4 == $Z \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 e_4 $W e_3 \/ $W == e_1 \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 e_4 $Z e_3 \/ e_1 == $Z \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 e_4 e_1 $W \/ $W == e_3 \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 e_4 e_1 $Z \/ e_3 == $Z \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- product2 e_4 e_2 e_1 \/ product2 e_4 e_2 e_2 \/ product2 e_4 e_2 e_3
% 3.50/3.67  |- ~product2 $W e_2 e_3 \/ $W == e_4 \/ product2 e_4 e_2 e_1 \/
% 3.50/3.67     product2 e_4 e_2 e_2
% 3.50/3.67  |- ~product2 $Z e_2 e_3 \/ e_4 == $Z \/ product2 e_4 e_2 e_1 \/
% 3.50/3.67     product2 e_4 e_2 e_2
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% 3.50/3.67     product2 e_4 e_2 e_2
% 3.50/3.67  |- ~product2 e_4 $Z e_3 \/ e_2 == $Z \/ product2 e_4 e_2 e_1 \/
% 3.50/3.67     product2 e_4 e_2 e_2
% 3.50/3.67  |- ~product2 e_4 e_2 $W \/ $W == e_3 \/ product2 e_4 e_2 e_1 \/
% 3.50/3.67     product2 e_4 e_2 e_2
% 3.50/3.67  |- ~product2 e_4 e_2 $Z \/ e_3 == $Z \/ product2 e_4 e_2 e_1 \/
% 3.50/3.67     product2 e_4 e_2 e_2
% 3.50/3.67  |- product2 e_4 e_1 e_1 \/ product2 e_4 e_1 e_2 \/ product2 e_4 e_2 e_1
% 3.50/3.67  |- ~product2 $W e_2 e_1 \/ $W == e_4 \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 $Z e_2 e_1 \/ e_4 == $Z \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 e_4 $W e_1 \/ $W == e_2 \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 e_4 $Z e_1 \/ e_2 == $Z \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 e_4 e_2 $W \/ $W == e_1 \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 e_4 e_2 $Z \/ e_1 == $Z \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- product1 e_2 e_4 e_1 \/ product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_1 e_2
% 3.50/3.67  |- ~product2 $W e_1 e_2 \/ $W == e_4 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product1 e_2 e_4 e_1 \/
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% 3.50/3.67  |- ~product2 e_4 $W e_2 \/ $W == e_1 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 e_4 $Z e_2 \/ e_1 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 e_4 e_1 $W \/ $W == e_2 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- product1 e_2 e_4 e_1 \/ product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1 \/
% 3.50/3.67     product2 e_4 e_3 e_1
% 3.50/3.67  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.67     product1 e_2 e_4 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.67  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.67     product1 e_4 e_2 e_2
% 3.50/3.67  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.67  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.67     product1 e_4 e_2 e_2
% 3.50/3.67  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.67     product1 e_4 e_2 e_2
% 3.50/3.67  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.67     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_4 e_2 e_1 \/
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% 3.50/3.67  |- ~product2 $W e_2 e_1 \/ $W == e_4 \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.67  |- ~product2 $Z e_2 e_1 \/ e_4 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.67  |- ~product2 e_4 $Z e_1 \/ e_2 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.67  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.67  |- ~product2 e_2 $W e_1 \/ $W == e_4 \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.67  |- ~product2 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.67  |- ~product2 e_2 e_4 $W \/ $W == e_1 \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.67  |- ~product2 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.67  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 e_2 e_4 $W \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.67     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1
% 3.50/3.67  |- product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/
% 3.50/3.67     product2 e_3 e_1 e_1 \/ product2 e_3 e_1 e_2
% 3.50/3.67  |- ~product2 $W e_1 e_2 \/ $W == e_3 \/ product2 e_2 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 $Z e_1 e_2 \/ e_3 == $Z \/ product2 e_2 e_1 e_1 \/
% 3.50/3.67     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 $W e_2 \/ $W == e_1 \/ product2 e_2 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 e_3 $Z e_2 \/ e_1 == $Z \/ product2 e_2 e_1 e_1 \/
% 3.50/3.67     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 e_1 $W \/ $W == e_2 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.67     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 e_1 $Z \/ e_2 == $Z \/ product2 e_2 e_1 e_1 \/
% 3.50/3.67     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/
% 3.50/3.67     product2 e_3 e_1 e_1 \/ product2 e_3 e_4 e_1
% 3.50/3.67  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product2 e_2 e_1 e_1 \/
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% 3.50/3.67  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product2 e_2 e_1 e_1 \/
% 3.50/3.67     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.67  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.67     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.68  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.68  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product2 e_2 e_1 e_1 \/
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% 3.50/3.68  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.68  |- product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3 \/
% 3.50/3.68     product2 e_2 e_3 e_1
% 3.50/3.68  |- ~product2 $W e_3 e_1 \/ $W == e_2 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.68  |- ~product2 $Z e_3 e_1 \/ e_2 == $Z \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.68  |- ~product2 e_2 $W e_1 \/ $W == e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.68  |- ~product2 e_2 $Z e_1 \/ e_3 == $Z \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.68  |- ~product2 e_2 e_3 $W \/ $W == e_1 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.68  |- ~product2 e_2 e_3 $Z \/ e_1 == $Z \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.68  |- product2 e_1 e_4 e_1 \/ product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.68  |- ~product2 $W e_1 e_3 \/ $W == e_2 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.68     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.68  |- ~product2 $Z e_1 e_3 \/ e_2 == $Z \/ product2 e_1 e_4 e_1 \/
% 3.50/3.68     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.68  |- ~product2 e_2 $W e_3 \/ $W == e_1 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.68     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.68  |- ~product2 e_2 $Z e_3 \/ e_1 == $Z \/ product2 e_1 e_4 e_1 \/
% 3.50/3.68     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.68  |- ~product2 e_2 e_1 $W \/ $W == e_3 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.68     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.68  |- ~product2 e_2 e_1 $Z \/ e_3 == $Z \/ product2 e_1 e_4 e_1 \/
% 3.50/3.68     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.68  |- product2 e_1 e_4 e_1 \/ product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.68     product2 e_2 e_1 e_2 \/ product2 e_4 e_1 e_1 \/ product2 e_4 e_1 e_2
% 3.50/3.68  |- product2 e_1 e_3 e_1 \/ product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/
% 3.50/3.68     product2 e_2 e_3 e_1
% 3.50/3.68  |- ~product2 $W e_3 e_1 \/ $W == e_2 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3
% 3.50/3.68  |- ~product2 $Z e_3 e_1 \/ e_2 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3
% 3.50/3.68  |- ~product2 e_2 $W e_1 \/ $W == e_3 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3
% 3.50/3.68  |- ~product2 e_2 $Z e_1 \/ e_3 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3
% 3.50/3.68  |- ~product2 e_2 e_3 $W \/ $W == e_1 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3
% 3.50/3.68  |- ~product2 e_2 e_3 $Z \/ e_1 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3
% 3.50/3.68  |- product2 e_1 e_3 e_1 \/ product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/
% 3.50/3.68     product2 e_1 e_4 e_1 \/ product2 e_1 e_4 e_2
% 3.50/3.68  |- ~product2 $W e_4 e_2 \/ $W == e_1 \/ product2 e_1 e_3 e_1 \/
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% 3.50/3.68  |- ~product2 $Z e_4 e_2 \/ e_1 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- ~product2 e_1 $W e_2 \/ $W == e_4 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- ~product2 e_1 $Z e_2 \/ e_4 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- ~product2 e_1 e_4 $W \/ $W == e_2 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- ~product2 e_1 e_4 $Z \/ e_2 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- product2 e_1 e_3 e_1 \/ product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/
% 3.50/3.68     product2 e_1 e_4 e_1 \/ product2 e_3 e_4 e_1
% 3.50/3.68  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product2 e_1 e_3 e_1 \/
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% 3.50/3.68  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.68     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.68  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product1 e_3 e_4 e_1 \/
% 3.50/3.68     product2 e_2 e_3 e_1
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% 3.50/3.68  |- ~product2 $Z e_3 e_1 \/ e_2 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.68     product1 e_1 e_4 e_2 \/ product1 e_3 e_4 e_1
% 3.50/3.68  |- ~product2 e_2 $W e_1 \/ $W == e_3 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.68     product1 e_1 e_4 e_2 \/ product1 e_3 e_4 e_1
% 3.50/3.68  |- ~product2 e_2 $Z e_1 \/ e_3 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.68     product1 e_1 e_4 e_2 \/ product1 e_3 e_4 e_1
% 3.50/3.68  |- ~product2 e_2 e_3 $W \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
% 3.50/3.68     product1 e_1 e_4 e_2 \/ product1 e_3 e_4 e_1
% 3.50/3.68  |- ~product2 e_2 e_3 $Z \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.68     product1 e_1 e_4 e_2 \/ product1 e_3 e_4 e_1
% 3.50/3.68  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.50/3.68     product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2
% 3.50/3.68  |- ~product1 $X e_1 e_3 \/ product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/
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% 3.50/3.68  |- ~product1 $W e_1 e_2 \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.68  |- ~product1 $Z e_1 e_2 \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.68  |- ~product1 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.68     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.50/3.68  |- ~product1 e_2 $W e_1 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.68  |- ~product1 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.68     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.50/3.68  |- ~product1 e_2 e_4 $W \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.68  |- ~product1 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.68     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.50/3.68  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
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% 3.50/3.68  |- ~product1 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.68  |- ~product2 $W e_3 e_4 \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.68  |- ~product2 $Z e_3 e_4 \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.68  |- ~product2 e_1 e_3 $W \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.68  |- ~product2 e_1 e_3 $Z \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.68     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_3 e_4 e_1
% 3.50/3.68  |- product2 e_3 e_1 e_1 \/ product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/
% 3.50/3.68     product2 e_3 e_2 e_1
% 3.50/3.68  |- ~product2 $W e_2 e_1 \/ $W == e_3 \/ product2 e_3 e_1 e_1 \/
% 3.50/3.68     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3
% 3.50/3.68  |- ~product2 $Z e_2 e_1 \/ e_3 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.68     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3
% 3.50/3.68  |- ~product2 e_3 $W e_1 \/ $W == e_2 \/ product2 e_3 e_1 e_1 \/
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% 3.50/3.68  |- ~product2 e_3 $Z e_1 \/ e_2 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.68     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3
% 3.50/3.68  |- ~product2 e_3 e_2 $W \/ $W == e_1 \/ product2 e_3 e_1 e_1 \/
% 3.50/3.68     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3
% 3.50/3.68  |- ~product2 e_3 e_2 $Z \/ e_1 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.68     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3
% 3.50/3.68  |- product2 e_3 e_1 e_1 \/ product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/
% 3.50/3.68     product2 e_4 e_1 e_1 \/ product2 e_4 e_1 e_2
% 3.50/3.68  |- ~product2 $W e_1 e_2 \/ $W == e_4 \/ product2 e_3 e_1 e_1 \/
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% 3.50/3.68  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.68     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.68  |- ~product2 e_4 $W e_2 \/ $W == e_1 \/ product2 e_3 e_1 e_1 \/
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% 3.50/3.69  |- ~product2 e_4 $Z e_2 \/ e_1 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_1 $W \/ $W == e_2 \/ product2 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- product2 e_3 e_1 e_1 \/ product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/
% 3.50/3.69     product2 e_4 e_1 e_1 \/ product2 e_4 e_3 e_1
% 3.50/3.69  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product2 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product2 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product2 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product2 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_3 e_1 e_2 \/ product2 e_3 e_1 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/
% 3.50/3.69     product2 e_3 e_2 e_1
% 3.50/3.69  |- ~product2 $W e_2 e_1 \/ $W == e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3
% 3.50/3.69  |- ~product2 $Z e_2 e_1 \/ e_3 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3
% 3.50/3.69  |- ~product2 e_3 $W e_1 \/ $W == e_2 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3
% 3.50/3.69  |- ~product2 e_3 $Z e_1 \/ e_2 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3
% 3.50/3.69  |- ~product2 e_3 e_2 $W \/ $W == e_1 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3
% 3.50/3.69  |- ~product2 e_3 e_2 $Z \/ e_1 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3
% 3.50/3.69  |- product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/
% 3.50/3.69     product2 e_4 e_1 e_1 \/ product2 e_4 e_1 e_2
% 3.50/3.69  |- ~product2 $W e_1 e_2 \/ $W == e_4 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $W e_2 \/ $W == e_1 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $Z e_2 \/ e_1 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_1 $W \/ $W == e_2 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/
% 3.50/3.69     product2 e_4 e_1 e_1 \/ product2 e_4 e_3 e_1
% 3.50/3.69  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 $W e_4 e_2 \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.69     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 $Z e_4 e_2 \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.50/3.69     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 e_1 $W e_2 \/ $W == e_4 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.69     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 e_1 $Z e_2 \/ e_4 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.50/3.69     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 e_1 e_4 $W \/ $W == e_2 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.69     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 e_1 e_4 $Z \/ e_2 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.50/3.69     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.50/3.69     product1 e_4 e_2 e_1 \/ product1 e_4 e_2 e_2 \/ product2 e_3 e_4 e_1
% 3.50/3.69  |- ~product2 $W e_1 e_2 \/ $W == e_4 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.69     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product2 e_1 e_4 e_1 \/
% 3.50/3.69     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $W e_2 \/ $W == e_1 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.69     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $Z e_2 \/ e_1 == $Z \/ product2 e_1 e_4 e_1 \/
% 3.50/3.69     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_1 $W \/ $W == e_2 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.69     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product2 e_1 e_4 e_1 \/
% 3.50/3.69     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- product2 e_1 e_4 e_1 \/ product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.69     product2 e_2 e_1 e_2 \/ product2 e_4 e_1 e_1 \/ product2 e_4 e_3 e_1
% 3.50/3.69  |- ~product2 $W e_4 e_2 \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 $Z e_4 e_2 \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 e_1 $W e_2 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 e_1 $Z e_2 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 e_1 e_4 $W \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- ~product2 e_1 e_4 $Z \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.69     product1 e_4 e_2 e_2
% 3.50/3.69  |- product1 e_2 e_4 e_1 \/ product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.69     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.69  |- ~product2 $W e_1 e_3 \/ $W == e_2 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.69     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.69  |- ~product2 $Z e_1 e_3 \/ e_2 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.69     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.69  |- ~product2 e_2 $W e_3 \/ $W == e_1 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.69     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.69  |- ~product2 e_2 $Z e_3 \/ e_1 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.69     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.69  |- ~product2 e_2 e_1 $W \/ $W == e_3 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.69     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.69  |- ~product2 e_2 e_1 $Z \/ e_3 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.69     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.69  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.69     product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2
% 3.50/3.69  |- ~product1 $X e_3 e_1 \/ product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/
% 3.50/3.69     product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1 \/ product2 e_2 $X e_3
% 3.50/3.69  |- ~product1 $W e_3 e_2 \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 $Z e_3 e_2 \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 e_1 $W e_2 \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 e_1 $Z e_2 \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 e_1 e_3 $W \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 e_1 e_3 $Z \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.69     product1 e_1 e_3 e_1 \/ product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/
% 3.50/3.69     product1 e_2 e_3 e_3 \/ product2 e_4 e_1 e_3
% 3.50/3.69  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.69     product1 e_1 e_3 e_1 \/ product1 e_4 e_3 e_1
% 3.50/3.69  |- ~product1 $X e_3 e_4 \/ product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/
% 3.50/3.69     product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1 \/ product2 e_1 $X e_3
% 3.50/3.69  |- ~product1 e_1 e_3 $Z2 \/ product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/
% 3.50/3.69     product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1 \/ product2 $Z2 e_4 e_3
% 3.50/3.69  |- ~product1 $W e_3 e_1 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 e_4 $W e_1 \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 e_4 $Z e_1 \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 e_4 e_3 $W \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- ~product1 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.69     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.50/3.69  |- product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/
% 3.50/3.69     product2 e_1 e_3 e_1 \/ product2 e_1 e_3 e_2
% 3.50/3.69  |- ~product2 $W e_3 e_2 \/ $W == e_1 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- ~product2 $Z e_3 e_2 \/ e_1 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- ~product2 e_1 $W e_2 \/ $W == e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- ~product2 e_1 $Z e_2 \/ e_3 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- ~product2 e_1 e_3 $W \/ $W == e_2 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- ~product2 e_1 e_3 $Z \/ e_2 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/
% 3.50/3.69     product2 e_1 e_3 e_1 \/ product2 e_4 e_3 e_1
% 3.50/3.69  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product2 e_1 e_2 e_1 \/
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% 3.50/3.69  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product2 e_1 e_2 e_1 \/
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% 3.50/3.69  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.69     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.69  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.50/3.69     product1 e_3 e_1 e_1 \/ product2 e_4 e_3 e_1
% 3.50/3.69  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.69     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1
% 3.50/3.69  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.69     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.69  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.69  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.69  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.69  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.50/3.69     product1 e_3 e_1 e_1 \/ product2 e_4 e_1 e_1 \/ product2 e_4 e_1 e_2
% 3.50/3.69  |- ~product2 $W e_1 e_2 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $W e_2 \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 $Z e_2 \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.69     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_1 $W \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.69     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.69     product2 e_4 e_1 e_1
% 3.50/3.69  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.69     product1 e_3 e_1 e_3 \/ product2 e_4 e_2 e_1
% 3.50/3.69  |- product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/
% 3.50/3.69     product1 e_3 e_2 e_1
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% 3.50/3.69     product1 e_2 e_3 e_3 \/ product2 $Z2 e_3 e_2
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% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 $Z e_2 e_1 \/ e_3 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 e_3 $W e_1 \/ $W == e_2 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 e_3 $Z e_1 \/ e_2 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 e_3 e_2 $W \/ $W == e_1 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 e_3 e_2 $Z \/ e_1 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/
% 3.50/3.69     product1 e_4 e_2 e_1 \/ product1 e_4 e_2 e_2 \/ product2 e_1 e_4 e_2
% 3.50/3.69  |- product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/
% 3.50/3.69     product1 e_2 e_4 e_1
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% 3.50/3.69     product1 e_2 e_3 e_3 \/ product2 e_1 $X e_4
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% 3.50/3.69     product1 e_2 e_3 e_3 \/ product2 $Z2 e_2 e_4
% 3.50/3.69  |- ~product1 $W e_4 e_1 \/ $W == e_2 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 e_2 $W e_1 \/ $W == e_4 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 e_2 e_4 $W \/ $W == e_1 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- ~product1 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.69     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.69  |- product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/
% 3.50/3.69     product1 e_3 e_4 e_1 \/ product2 e_1 e_3 e_4
% 3.50/3.70  |- ~product2 $W e_3 e_4 \/ $W == e_1 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.70  |- ~product2 $Z e_3 e_4 \/ e_1 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_3 e_4 e_1
% 3.50/3.70  |- ~product2 e_1 $W e_4 \/ $W == e_3 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_3 e_4 e_1
% 3.50/3.70  |- ~product2 e_1 $Z e_4 \/ e_3 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_3 e_4 e_1
% 3.50/3.70  |- ~product2 e_1 e_3 $W \/ $W == e_4 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_3 e_4 e_1
% 3.50/3.70  |- ~product2 e_1 e_3 $Z \/ e_4 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_3 e_4 e_1
% 3.50/3.70  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.70     product2 e_4 e_3 e_2
% 3.50/3.70  |- ~product2 $W e_3 e_2 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.50/3.70  |- ~product2 $Z e_3 e_2 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.50/3.70  |- ~product2 e_4 $W e_2 \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.50/3.70  |- ~product2 e_4 $Z e_2 \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.50/3.70  |- ~product2 e_4 e_3 $W \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.50/3.70  |- ~product2 e_4 e_3 $Z \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3
% 3.50/3.70  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.50/3.70     product2 e_4 e_2 e_3
% 3.50/3.70  |- ~product2 $W e_2 e_3 \/ $W == e_4 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.50/3.70  |- ~product2 $Z e_2 e_3 \/ e_4 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.50/3.70  |- ~product2 e_4 $W e_3 \/ $W == e_2 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.50/3.70  |- ~product2 e_4 $Z e_3 \/ e_2 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.50/3.70  |- ~product2 e_4 e_2 $W \/ $W == e_3 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.50/3.70  |- ~product2 e_4 e_2 $Z \/ e_3 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3
% 3.50/3.70  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.50/3.70     product2 e_4 e_1 e_1 \/ product2 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 $W e_1 e_2 \/ $W == e_4 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 $W e_2 \/ $W == e_1 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 $Z e_2 \/ e_1 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 e_1 $W \/ $W == e_2 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.50/3.70     product2 e_4 e_1 e_1 \/ product2 e_4 e_3 e_1
% 3.50/3.70  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.50/3.70     product1 e_3 e_1 e_1 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.70     product2 e_2 e_1 e_3
% 3.50/3.70  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.50/3.70     product1 e_4 e_3 e_1 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.70     product2 e_2 e_1 e_3
% 3.50/3.70  |- ~product2 $W e_1 e_3 \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 $Z e_1 e_3 \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $W e_3 \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $Z e_3 \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_1 $W \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_1 $Z \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.50/3.70     product1 e_4 e_3 e_1 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.70     product2 e_4 e_1 e_1 \/ product2 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.70     product1 e_4 e_2 e_2
% 3.50/3.70  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.70     product1 e_4 e_2 e_2
% 3.50/3.70  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.70     product1 e_4 e_2 e_2
% 3.50/3.70  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.70     product1 e_4 e_2 e_2
% 3.50/3.70  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.70     product1 e_4 e_2 e_2
% 3.50/3.70  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.70     product1 e_4 e_2 e_2
% 3.50/3.70  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.70     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.70     product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product2 e_1 e_4 e_1 \/
% 3.50/3.70     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.70     product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.70     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.70     product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product2 e_1 e_4 e_1 \/
% 3.50/3.70     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.70     product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product2 e_1 e_4 e_1 \/
% 3.50/3.70     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.70     product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product2 e_1 e_4 e_1 \/
% 3.50/3.70     product2 e_1 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.50/3.70     product2 e_4 e_1 e_1
% 3.50/3.70  |- product1 e_2 e_4 e_1 \/ product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2 \/ product2 e_2 e_4 e_1
% 3.50/3.70  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $W e_1 \/ $W == e_4 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_4 $W \/ $W == e_1 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $W e_1 \/ $W == e_4 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_4 $W \/ $W == e_1 \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_2 e_4 e_1 \/
% 3.50/3.70     product1 e_2 e_4 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2
% 3.50/3.70  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.50/3.70     product1 e_4 e_2 e_1 \/ product1 e_4 e_2 e_2 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3
% 3.50/3.70  |- ~product2 $W e_1 e_2 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 $W e_2 \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 $Z e_2 \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 e_1 $W \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.70  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.50/3.70     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1 \/
% 3.50/3.70     product2 e_4 e_3 e_1
% 3.50/3.70  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.70     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3
% 3.50/3.70  |- ~product2 $W e_2 e_3 \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2
% 3.50/3.70  |- ~product2 $Z e_2 e_3 \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2
% 3.50/3.70  |- ~product2 e_1 $W e_3 \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2
% 3.50/3.70  |- ~product2 e_1 $Z e_3 \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2
% 3.50/3.70  |- ~product2 e_1 e_2 $W \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2
% 3.50/3.70  |- ~product2 e_1 e_2 $Z \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.70     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2
% 3.50/3.70  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $W e_1 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_4 $W \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2
% 3.50/3.70  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.70  |- ~product2 $W e_1 e_3 \/ $W == e_2 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 $Z e_1 e_3 \/ e_2 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $W e_3 \/ $W == e_1 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $Z e_3 \/ e_1 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_1 $W \/ $W == e_3 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_1 $Z \/ e_3 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.70     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 $W e_1 e_3 \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 $Z e_1 e_3 \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $W e_3 \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $Z e_3 \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_1 $W \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_1 $Z \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.70     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.50/3.70  |- product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/
% 3.50/3.70     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.50/3.70  |- ~product2 $W e_1 e_3 \/ $W == e_2 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 $Z e_1 e_3 \/ e_2 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $W e_3 \/ $W == e_1 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 $Z e_3 \/ e_1 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_1 $W \/ $W == e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- ~product2 e_2 e_1 $Z \/ e_3 == $Z \/ product2 e_1 e_2 e_1 \/
% 3.50/3.70     product2 e_1 e_2 e_2 \/ product2 e_1 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.70     product2 e_2 e_1 e_2
% 3.50/3.70  |- product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/
% 3.50/3.70     product2 e_1 e_2 e_3
% 3.50/3.70  |- ~product2 $W e_2 e_3 \/ $W == e_1 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.70  |- ~product2 $Z e_2 e_3 \/ e_1 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.70  |- ~product2 e_1 $W e_3 \/ $W == e_2 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.70  |- ~product2 e_1 $Z e_3 \/ e_2 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.70  |- ~product2 e_1 e_2 $W \/ $W == e_3 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.70  |- ~product2 e_1 e_2 $Z \/ e_3 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.70     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
% 3.50/3.70  |- product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/
% 3.50/3.70     product2 e_1 e_4 e_1 \/ product2 e_1 e_4 e_2
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% 3.50/3.71  |- ~product2 e_1 $Z e_2 \/ e_4 == $Z \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71  |- ~product2 e_1 e_4 $W \/ $W == e_2 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71  |- ~product2 e_1 e_4 $Z \/ e_2 == $Z \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71     product2 e_1 e_4 e_1 \/ product2 e_3 e_4 e_1
% 3.50/3.71  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71     product2 e_4 e_2 e_1
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% 3.50/3.71  |- ~product2 $Z e_2 e_1 \/ e_4 == $Z \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71  |- ~product2 e_4 $W e_1 \/ $W == e_2 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71  |- ~product2 e_4 $Z e_1 \/ e_2 == $Z \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71  |- ~product2 e_4 e_2 $W \/ $W == e_1 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71  |- ~product2 e_4 e_2 $Z \/ e_1 == $Z \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71     product2 e_3 $X e_1
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% 3.50/3.71     product1 e_2 e_1 e_2
% 3.50/3.71  |- ~product1 $Z e_1 e_3 \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.71     product1 e_2 e_1 e_2
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% 3.50/3.71     product1 e_2 e_1 e_2
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% 3.50/3.71     product1 e_2 e_1 e_2
% 3.50/3.71  |- ~product1 e_2 e_1 $W \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.71     product1 e_2 e_1 e_2
% 3.50/3.71  |- ~product1 e_2 e_1 $Z \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.71  |- ~product2 $Z e_2 e_1 \/ e_4 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.71  |- ~product2 e_4 $Z e_1 \/ e_2 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.71  |- ~product2 e_4 e_2 $Z \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.71  |- ~product2 $W e_4 e_2 \/ $W == e_1 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71     product1 e_4 e_2 e_2
% 3.50/3.71  |- ~product2 $Z e_4 e_2 \/ e_1 == $Z \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71     product1 e_4 e_2 e_2
% 3.50/3.71  |- ~product2 e_1 $W e_2 \/ $W == e_4 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71     product1 e_4 e_2 e_2
% 3.50/3.71  |- ~product2 e_1 $Z e_2 \/ e_4 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.71     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.71     product1 e_4 e_2 e_2
% 3.50/3.71  |- ~product2 e_1 e_4 $W \/ $W == e_2 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71     product1 e_4 e_2 e_2
% 3.50/3.71  |- ~product2 e_1 e_4 $Z \/ e_2 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.71     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.71     product1 e_4 e_2 e_2
% 3.50/3.71  |- product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/
% 3.50/3.71     product1 e_4 e_2 e_1 \/ product1 e_4 e_2 e_2 \/ product2 e_3 e_4 e_1
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% 3.50/3.71     product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2
% 3.50/3.71  |- ~product1 $X e_1 e_3 \/ product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/
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% 3.50/3.71  |- ~product1 $W e_1 e_2 \/ $W == e_3 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.71     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product1 e_3 e_1 e_1
% 3.50/3.71  |- ~product1 $Z e_1 e_2 \/ e_3 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.71     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product1 e_3 e_1 e_1
% 3.50/3.71  |- ~product1 e_3 $W e_2 \/ $W == e_1 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.71     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product1 e_3 e_1 e_1
% 3.50/3.71  |- ~product1 e_3 $Z e_2 \/ e_1 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.71     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product1 e_3 e_1 e_1
% 3.50/3.71  |- ~product1 e_3 e_1 $W \/ $W == e_2 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.71     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product1 e_3 e_1 e_1
% 3.50/3.71  |- ~product1 e_3 e_1 $Z \/ e_2 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.71     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product1 e_3 e_1 e_1
% 3.50/3.71  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.50/3.71     product1 e_3 e_1 e_1 \/ product1 e_3 e_4 e_1
% 3.50/3.71  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
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% 3.50/3.71     product2 e_2 e_4 e_1
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% 3.50/3.71  |- ~product1 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.71     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product1 e_3 e_1 e_1
% 3.50/3.71  |- ~product1 e_3 $W e_1 \/ $W == e_4 \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.71  |- ~product1 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.71  |- ~product1 e_3 e_4 $W \/ $W == e_1 \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.71  |- ~product1 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.71  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
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% 3.50/3.71  |- ~product2 $W e_3 e_2 \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- ~product2 $Z e_3 e_2 \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.71     product2 e_1 e_3 e_1
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% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- ~product2 e_1 $Z e_2 \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.71     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- ~product2 e_1 e_3 $W \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- ~product2 e_1 e_3 $Z \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.71     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.50/3.71     product1 e_4 e_3 e_1 \/ product2 e_1 e_3 e_1 \/ product2 e_4 e_3 e_1
% 3.50/3.71  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.71     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.71     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.71     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.71     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.71     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.71     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.50/3.71     product2 e_1 e_3 e_1
% 3.50/3.71  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
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% 3.50/3.71  |- ~product2 e_3 e_1 $W \/ $W == e_2 \/ product1 e_2 e_3 e_1 \/
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% 3.50/3.71  |- ~product2 e_1 e_3 $W \/ $W == e_2 \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.71     product2 e_4 e_3 e_1
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% 3.50/3.71  |- product1 e_3 e_2 e_1 \/ product1 e_3 e_2 e_2 \/ product1 e_3 e_2 e_3 \/
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% 3.50/3.71  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.71  |- ~product2 e_4 e_1 $W \/ $W == e_2 \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.71  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product1 e_3 e_2 e_1 \/
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% 3.50/3.71     product1 e_1 e_4 e_2
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% 3.50/3.71  |- ~product1 e_4 e_1 $Z \/ e_2 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.71     product1 e_1 e_4 e_2 \/ product1 e_4 e_1 e_1
% 3.50/3.71  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product1 e_4 e_1 e_1 \/
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% 3.50/3.71  |- ~product1 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.71     product1 e_1 e_4 e_2 \/ product1 e_4 e_1 e_1
% 3.50/3.71  |- ~product1 e_4 $Z e_1 \/ e_3 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.71  |- ~product1 e_4 e_3 $W \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.71  |- ~product1 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.71     product1 e_1 e_4 e_2 \/ product1 e_4 e_1 e_1
% 3.50/3.71  |- ~product2 $W e_4 e_2 \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.71  |- ~product2 $Z e_4 e_2 \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.72  |- ~product2 e_1 e_4 $Z \/ e_2 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.72     product1 e_1 e_4 e_2 \/ product1 e_4 e_2 e_1 \/ product1 e_4 e_2 e_2
% 3.50/3.72  |- product1 e_1 e_4 e_1 \/ product1 e_1 e_4 e_2 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.72     product1 e_4 e_2 e_2 \/ product2 e_3 e_4 e_1
% 3.50/3.72  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.72  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_1 e_4 e_1 \/
% 3.50/3.72     product1 e_1 e_4 e_2 \/ product1 e_4 e_2 e_1 \/ product1 e_4 e_2 e_2
% 3.50/3.72  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.72  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.72  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.72  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.50/3.72     product2 e_2 e_1 e_2
% 3.50/3.72  |- ~product2 $Z e_1 e_3 \/ e_2 == $Z \/ product1 e_3 e_2 e_1 \/
% 3.50/3.72     product1 e_3 e_2 e_2 \/ product1 e_3 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.72     product2 e_2 e_1 e_2
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% 3.50/3.72     product2 e_2 e_1 e_2
% 3.50/3.72  |- ~product2 e_2 $Z e_3 \/ e_1 == $Z \/ product1 e_3 e_2 e_1 \/
% 3.50/3.72     product1 e_3 e_2 e_2 \/ product1 e_3 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.72     product2 e_2 e_1 e_2
% 3.50/3.72  |- ~product2 e_2 e_1 $W \/ $W == e_3 \/ product1 e_3 e_2 e_1 \/
% 3.50/3.72     product1 e_3 e_2 e_2 \/ product1 e_3 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.72     product2 e_2 e_1 e_2
% 3.50/3.72  |- ~product2 e_2 e_1 $Z \/ e_3 == $Z \/ product1 e_3 e_2 e_1 \/
% 3.50/3.72     product1 e_3 e_2 e_2 \/ product1 e_3 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.72     product2 e_2 e_1 e_2
% 3.50/3.72  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.72     product2 e_3 e_1 e_1 \/ product2 e_3 e_1 e_2
% 3.50/3.72  |- ~product2 $W e_1 e_2 \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 $Z e_1 e_2 \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 $W e_2 \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 $Z e_2 \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 e_1 $W \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 e_1 $Z \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.72     product2 e_3 e_1 e_1 \/ product2 e_3 e_4 e_1
% 3.50/3.72  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.72     product2 e_1 e_4 e_1 \/ product2 e_1 e_4 e_2
% 3.50/3.72  |- ~product2 $W e_4 e_2 \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- ~product2 $Z e_4 e_2 \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- ~product2 e_1 $W e_2 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- ~product2 e_1 $Z e_2 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- ~product2 e_1 e_4 $W \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.72  |- ~product2 e_1 e_4 $Z \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.72     product2 e_1 e_4 e_1 \/ product2 e_3 e_4 e_1
% 3.50/3.72  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_4 e_1
% 3.50/3.72  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.50/3.72     product2 e_1 e_3 e_1 \/ product2 e_1 e_3 e_2
% 3.50/3.72  |- ~product2 $W e_3 e_2 \/ $W == e_1 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 $Z e_3 e_2 \/ e_1 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_1 $W e_2 \/ $W == e_3 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_1 $Z e_2 \/ e_3 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_1 e_3 $W \/ $W == e_2 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_1 e_3 $Z \/ e_2 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.50/3.72     product2 e_1 e_3 e_1 \/ product2 e_4 e_3 e_1
% 3.50/3.72  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_1 e_3 e_1
% 3.50/3.72  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.50/3.72     product1 e_3 e_1 e_1 \/ product2 e_1 e_3 e_1 \/ product2 e_1 e_3 e_2
% 3.50/3.72  |- ~product2 $W e_3 e_2 \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 $Z e_3 e_2 \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_1 $W e_2 \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_1 $Z e_2 \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_1 e_3 $W \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_1
% 3.50/3.72  |- ~product2 e_1 e_3 $Z \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_1
% 3.50/3.72  |- product2 e_1 e_3 e_1 \/ product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/
% 3.50/3.72     product2 e_3 e_1 e_1 \/ product2 e_3 e_1 e_2
% 3.50/3.72  |- ~product2 $W e_1 e_2 \/ $W == e_3 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 $Z e_1 e_2 \/ e_3 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 $W e_2 \/ $W == e_1 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 $Z e_2 \/ e_1 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 e_1 $W \/ $W == e_2 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 e_1 $Z \/ e_2 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- product2 e_1 e_3 e_1 \/ product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/
% 3.50/3.72     product2 e_3 e_1 e_1 \/ product2 e_3 e_4 e_1
% 3.50/3.72  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product2 e_1 e_3 e_1 \/
% 3.50/3.72     product2 e_1 e_3 e_2 \/ product2 e_1 e_3 e_3 \/ product2 e_3 e_1 e_1
% 3.50/3.72  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.72     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.72  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.72     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.72  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.72     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.72  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.72     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.72  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.72     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.72  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.50/3.72     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.50/3.72     product1 e_4 e_1 e_2 \/ product2 e_4 e_1 e_1
% 3.50/3.72  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.72     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.72     product1 e_4 e_2 e_2
% 3.50/3.72  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.72     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.72     product1 e_4 e_2 e_2
% 3.50/3.72  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.72     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.72     product1 e_4 e_2 e_2
% 3.50/3.72  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.72     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.72     product1 e_4 e_2 e_2
% 3.50/3.72  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_2 e_3 e_1 \/
% 3.50/3.72     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.72     product1 e_4 e_2 e_2
% 3.50/3.72  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.50/3.72     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.72     product1 e_4 e_2 e_2
% 3.50/3.72  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.50/3.72     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/ product2 e_4 e_2 e_1
% 3.50/3.72  |- ~product2 $W e_2 e_1 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.72     product2 e_1 e_2 e_2
% 3.50/3.72  |- ~product2 $Z e_2 e_1 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.72     product2 e_1 e_2 e_2
% 3.50/3.72  |- ~product2 e_4 $W e_1 \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.72     product2 e_1 e_2 e_2
% 3.50/3.72  |- ~product2 e_4 $Z e_1 \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.72     product2 e_1 e_2 e_2
% 3.50/3.72  |- ~product2 e_4 e_2 $W \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.72     product2 e_1 e_2 e_2
% 3.50/3.72  |- ~product2 e_4 e_2 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.50/3.72     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product2 e_1 e_2 e_1 \/
% 3.50/3.72     product2 e_1 e_2 e_2
% 3.50/3.72  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.50/3.72     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/ product2 e_2 e_4 e_1
% 3.50/3.72  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.72     product2 e_2 e_1 e_2
% 3.50/3.72  |- ~product2 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.72     product2 e_2 e_1 e_2
% 3.50/3.72  |- ~product2 e_2 $W e_1 \/ $W == e_4 \/ product1 e_1 e_3 e_1 \/
% 3.50/3.72     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.50/3.72     product2 e_2 e_1 e_2
% 3.50/3.72  |- ~product2 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_3 e_1 \/
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% 3.50/3.73  |- ~product2 e_3 $W e_2 \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
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% 3.50/3.73     product1 e_4 e_2 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.73  |- ~product2 e_3 $Z e_2 \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.50/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.73     product1 e_4 e_2 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.73  |- ~product2 e_3 e_1 $W \/ $W == e_2 \/ product1 e_3 e_1 e_1 \/
% 3.50/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.73     product1 e_4 e_2 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.73  |- ~product2 e_3 e_1 $Z \/ e_2 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.50/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.50/3.73     product1 e_4 e_2 e_2 \/ product2 e_3 e_1 e_1
% 3.50/3.73  |- ~product2 $W e_1 e_2 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.73  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.73  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.50/3.73  |- ~product2 $Z e_2 e_3 \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
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% 3.50/3.73  |- ~product2 e_1 $Z e_3 \/ e_2 == $Z \/ product1 e_3 e_1 e_1 \/
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% 3.50/3.73  |- ~product2 e_1 e_2 $W \/ $W == e_3 \/ product1 e_3 e_1 e_1 \/
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% 3.50/3.73  |- ~product2 e_1 e_2 $Z \/ e_3 == $Z \/ product1 e_3 e_1 e_1 \/
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% 3.50/3.73  |- ~product2 $Z e_1 e_3 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.50/3.73     product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3
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% 3.58/3.73  |- ~product2 e_4 $Z e_3 \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.58/3.73  |- ~product2 e_4 e_1 $W \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
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% 3.58/3.73  |- ~product2 e_4 e_1 $Z \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.58/3.73  |- ~product2 $W e_1 e_2 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.73     product2 e_1 e_3 e_1 \/ product2 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 $Z e_1 e_2 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.73     product2 e_1 e_3 e_1 \/ product2 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 e_4 $W e_2 \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.73     product2 e_1 e_3 e_1 \/ product2 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 e_4 $Z e_2 \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.73     product2 e_1 e_3 e_1 \/ product2 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 e_4 e_1 $W \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.73     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_3 e_1 \/
% 3.58/3.73     product2 e_1 e_3 e_1 \/ product2 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 e_4 e_1 $Z \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.73     product2 e_1 e_3 e_1 \/ product2 e_4 e_1 e_1
% 3.58/3.73  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.58/3.73     product1 e_3 e_4 e_1 \/ product2 e_2 e_3 e_1
% 3.58/3.73  |- ~product2 $W e_3 e_1 \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
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% 3.58/3.73  |- ~product2 $Z e_3 e_1 \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.58/3.73     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_3 e_4 e_1
% 3.58/3.73  |- ~product2 e_2 $W e_1 \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
% 3.58/3.73     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_3 e_4 e_1
% 3.58/3.73  |- ~product2 e_2 $Z e_1 \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.58/3.73     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_3 e_4 e_1
% 3.58/3.73  |- ~product2 e_2 e_3 $W \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
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% 3.58/3.73  |- ~product2 e_2 e_3 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.58/3.73     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_3 e_4 e_1
% 3.58/3.73  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.58/3.73     product1 e_4 e_1 e_1 \/ product2 e_2 e_3 e_1
% 3.58/3.73  |- ~product2 $W e_3 e_1 \/ $W == e_2 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 $Z e_3 e_1 \/ e_2 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 e_2 $W e_1 \/ $W == e_3 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 e_2 $Z e_1 \/ e_3 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 e_2 e_3 $W \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1
% 3.58/3.73  |- ~product2 e_2 e_3 $Z \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1
% 3.58/3.73  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.58/3.73     product1 e_4 e_1 e_1 \/ product2 e_1 e_4 e_1 \/ product2 e_1 e_4 e_2
% 3.58/3.73  |- ~product2 $W e_4 e_2 \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 $Z e_4 e_2 \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 e_1 $W e_2 \/ $W == e_4 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 e_1 $Z e_2 \/ e_4 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 e_1 e_4 $W \/ $W == e_2 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 e_1 e_4 $Z \/ e_2 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.58/3.73     product1 e_4 e_1 e_1 \/ product2 e_1 e_4 e_1 \/ product2 e_3 e_4 e_1
% 3.58/3.73  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.73     product2 e_1 e_4 e_1
% 3.58/3.73  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.58/3.73     product1 e_3 e_1 e_1 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2 \/
% 3.58/3.73     product2 e_2 e_4 e_1
% 3.58/3.73  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.73     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.73  |- ~product2 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.73     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.73  |- ~product2 e_2 $W e_1 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.73     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.73  |- ~product2 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.73     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.73  |- ~product2 e_2 e_4 $W \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.73     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.73  |- ~product2 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.73     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.73     product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.73  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.58/3.73     product1 e_1 e_3 e_1 \/ product2 e_2 e_4 e_3
% 3.58/3.73  |- ~product2 $W e_4 e_3 \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
% 3.58/3.73     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_1 e_3 e_1
% 3.58/3.73  |- ~product2 $Z e_4 e_3 \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.58/3.73  |- ~product2 e_2 $W e_3 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 $Z e_3 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
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% 3.58/3.74  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_1 e_4 e_1 \/
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% 3.58/3.74     product1 e_4 e_1 e_1
% 3.58/3.74  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.58/3.74     product1 e_4 e_1 e_1
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% 3.58/3.74     product1 e_4 e_1 e_1
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% 3.58/3.74     product1 e_4 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_4 e_1 \/
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% 3.58/3.74     product1 e_4 e_1 e_1
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% 3.58/3.74  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.74  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.74  |- product1 e_3 e_2 e_1 \/ product1 e_3 e_2 e_2 \/ product1 e_3 e_2 e_3 \/
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% 3.58/3.74  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product1 e_3 e_2 e_1 \/
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% 3.58/3.74     product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_3 e_2 e_1 \/
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% 3.58/3.74     product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 e_2 $W e_1 \/ $W == e_4 \/ product1 e_3 e_2 e_1 \/
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% 3.58/3.74     product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_3 e_2 e_1 \/
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% 3.58/3.74     product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 e_2 e_4 $W \/ $W == e_1 \/ product1 e_3 e_2 e_1 \/
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% 3.58/3.74     product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_3 e_2 e_1 \/
% 3.58/3.74     product1 e_3 e_2 e_2 \/ product1 e_3 e_2 e_3 \/ product2 e_2 e_1 e_1 \/
% 3.58/3.74     product2 e_2 e_1 e_2
% 3.58/3.74  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.58/3.74     product1 e_4 e_1 e_1 \/ product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/
% 3.58/3.74     product2 e_1 e_2 e_3
% 3.58/3.74  |- ~product2 $W e_2 e_3 \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 $Z e_2 e_3 \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_1 $W e_3 \/ $W == e_2 \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_1 $Z e_3 \/ e_2 == $Z \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_1 e_2 $W \/ $W == e_3 \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_1 e_2 $Z \/ e_3 == $Z \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.58/3.74     product1 e_4 e_1 e_1 \/ product2 e_3 e_1 e_1 \/ product2 e_3 e_1 e_2
% 3.58/3.74  |- ~product2 $W e_1 e_2 \/ $W == e_3 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 $Z e_1 e_2 \/ e_3 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 $W e_2 \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
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% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 $Z e_2 \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 e_1 $W \/ $W == e_2 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 e_1 $Z \/ e_2 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.58/3.74     product1 e_4 e_1 e_1 \/ product2 e_3 e_1 e_1 \/ product2 e_3 e_4 e_1
% 3.58/3.74  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_1 e_1
% 3.58/3.74  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.58/3.74     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/
% 3.58/3.74     product2 e_2 e_1 e_2 \/ product2 e_2 e_1 e_3
% 3.58/3.74  |- ~product2 $W e_1 e_3 \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.74  |- ~product2 $Z e_1 e_3 \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 $Z e_3 \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 e_2 e_1 $W \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 e_1 $Z \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
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% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.74  |- product1 e_2 e_3 e_1 \/ product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/
% 3.58/3.74     product1 e_3 e_4 e_1 \/ product2 e_2 e_3 e_1
% 3.58/3.74  |- ~product2 $W e_3 e_1 \/ $W == e_2 \/ product1 e_2 e_3 e_1 \/
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% 3.58/3.74  |- ~product2 $Z e_3 e_1 \/ e_2 == $Z \/ product1 e_2 e_3 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 $W e_1 \/ $W == e_3 \/ product1 e_2 e_3 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 $Z e_1 \/ e_3 == $Z \/ product1 e_2 e_3 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 e_3 $W \/ $W == e_1 \/ product1 e_2 e_3 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 e_3 $Z \/ e_1 == $Z \/ product1 e_2 e_3 e_1 \/
% 3.58/3.74     product1 e_2 e_3 e_2 \/ product1 e_2 e_3 e_3 \/ product1 e_3 e_4 e_1
% 3.58/3.74  |- product1 e_1 e_3 e_1 \/ product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/
% 3.58/3.74     product1 e_1 e_4 e_1 \/ product2 e_2 e_3 e_4
% 3.58/3.74  |- ~product2 $W e_3 e_4 \/ $W == e_2 \/ product1 e_1 e_3 e_1 \/
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% 3.58/3.74  |- ~product2 $Z e_3 e_4 \/ e_2 == $Z \/ product1 e_1 e_3 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 $W e_4 \/ $W == e_3 \/ product1 e_1 e_3 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 $Z e_4 \/ e_3 == $Z \/ product1 e_1 e_3 e_1 \/
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% 3.58/3.74  |- ~product2 e_2 e_3 $W \/ $W == e_4 \/ product1 e_1 e_3 e_1 \/
% 3.58/3.74     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product1 e_1 e_4 e_1
% 3.58/3.74  |- ~product2 e_2 e_3 $Z \/ e_4 == $Z \/ product1 e_1 e_3 e_1 \/
% 3.58/3.74     product1 e_1 e_3 e_2 \/ product1 e_1 e_3 e_3 \/ product1 e_1 e_4 e_1
% 3.58/3.74  |- product1 e_1 e_2 e_1 \/ product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/
% 3.58/3.74     product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_3 e_4 e_1
% 3.58/3.74  |- ~product2 $W e_4 e_1 \/ $W == e_3 \/ product1 e_1 e_2 e_1 \/
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% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_4 e_1 e_1
% 3.58/3.74  |- ~product2 $Z e_4 e_1 \/ e_3 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_4 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 $W e_1 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_4 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 $Z e_1 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_4 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 e_4 $W \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_4 e_1 e_1
% 3.58/3.74  |- ~product2 e_3 e_4 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_4 e_1 e_1
% 3.58/3.74  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.58/3.74     product1 e_4 e_1 e_1 \/ product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2 \/
% 3.58/3.74     product2 e_4 e_2 e_1
% 3.58/3.74  |- ~product2 $W e_2 e_1 \/ $W == e_4 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 $Z e_2 e_1 \/ e_4 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_4 $W e_1 \/ $W == e_2 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_4 $Z e_1 \/ e_2 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_4 e_2 $W \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_4 e_2 $Z \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/
% 3.58/3.74     product1 e_4 e_2 e_1 \/ product1 e_4 e_2 e_2 \/ product2 e_1 e_2 e_1 \/
% 3.58/3.74     product2 e_1 e_2 e_2 \/ product2 e_4 e_2 e_1
% 3.58/3.74  |- ~product2 $W e_2 e_1 \/ $W == e_4 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.58/3.74     product1 e_4 e_2 e_2 \/ product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 $Z e_2 e_1 \/ e_4 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.58/3.74     product1 e_4 e_2 e_2 \/ product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_4 $W e_1 \/ $W == e_2 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.58/3.74     product1 e_4 e_2 e_2 \/ product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_4 $Z e_1 \/ e_2 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.58/3.74     product1 e_4 e_2 e_2 \/ product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_4 e_2 $W \/ $W == e_1 \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.58/3.74     product1 e_4 e_2 e_2 \/ product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- ~product2 e_4 e_2 $Z \/ e_1 == $Z \/ product1 e_3 e_1 e_1 \/
% 3.58/3.74     product1 e_3 e_1 e_2 \/ product1 e_3 e_1 e_3 \/ product1 e_4 e_2 e_1 \/
% 3.58/3.74     product1 e_4 e_2 e_2 \/ product2 e_1 e_2 e_1 \/ product2 e_1 e_2 e_2
% 3.58/3.74  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.58/3.74     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1 \/
% 3.58/3.74     product2 e_1 e_3 e_2
% 3.58/3.74  |- ~product2 $W e_3 e_2 \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 $Z e_3 e_2 \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 e_1 $W e_2 \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 e_1 $Z e_2 \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 e_1 e_3 $W \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 e_1 e_3 $Z \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.58/3.74     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1 \/
% 3.58/3.74     product2 e_4 e_3 e_1
% 3.58/3.74  |- ~product2 $W e_3 e_1 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 $Z e_3 e_1 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 e_4 $W e_1 \/ $W == e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 e_4 $Z e_1 \/ e_3 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 e_4 e_3 $W \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 e_4 e_3 $Z \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_1 e_3 e_1
% 3.58/3.74  |- ~product2 $W e_2 e_1 \/ $W == e_4 \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/
% 3.58/3.74     product1 e_3 e_1 e_3
% 3.58/3.74  |- ~product2 $Z e_2 e_1 \/ e_4 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/
% 3.58/3.74     product1 e_3 e_1 e_3
% 3.58/3.74  |- ~product2 e_4 $W e_1 \/ $W == e_2 \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/
% 3.58/3.74     product1 e_3 e_1 e_3
% 3.58/3.74  |- ~product2 e_4 $Z e_1 \/ e_2 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/
% 3.58/3.74     product1 e_3 e_1 e_3
% 3.58/3.74  |- ~product2 e_4 e_2 $W \/ $W == e_1 \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/
% 3.58/3.74     product1 e_3 e_1 e_3
% 3.58/3.74  |- ~product2 e_4 e_2 $Z \/ e_1 == $Z \/ product1 e_1 e_2 e_1 \/
% 3.58/3.74     product1 e_1 e_2 e_2 \/ product1 e_1 e_2 e_3 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_3 e_1 e_1 \/ product1 e_3 e_1 e_2 \/
% 3.58/3.74     product1 e_3 e_1 e_3
% 3.58/3.74  |- product1 e_2 e_1 e_1 \/ product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/
% 3.58/3.74     product1 e_4 e_1 e_1 \/ product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/
% 3.58/3.74     product2 e_2 e_1 e_2 \/ product2 e_2 e_4 e_1
% 3.58/3.74  |- ~product2 $W e_4 e_1 \/ $W == e_2 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 $Z e_4 e_1 \/ e_2 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 e_2 $W e_1 \/ $W == e_4 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 e_2 $Z e_1 \/ e_4 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 e_2 e_4 $W \/ $W == e_1 \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.74  |- ~product2 e_2 e_4 $Z \/ e_1 == $Z \/ product1 e_2 e_1 e_1 \/
% 3.58/3.74     product1 e_2 e_1 e_2 \/ product1 e_2 e_1 e_3 \/ product1 e_4 e_1 e_1 \/
% 3.58/3.74     product1 e_4 e_1 e_2 \/ product2 e_2 e_1 e_1 \/ product2 e_2 e_1 e_2
% 3.58/3.74  SZS output end Saturation for /export/starexec/sandbox2/benchmark/theBenchmark.p
% 3.58/3.74  
%------------------------------------------------------------------------------