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<source>sheffer8.out</source>

<heading><![CDATA[
Mace4 (32) version 2009-02A, February 2009.
Process 11183 was started by mccune on cleo,
Wed Feb 25 09:32:06 2009
The command was "/home/mccune/bin/mace4 -f sheffer8.in".
]]></heading>

<input><![CDATA[
formulas(assumptions).
f(f(f(y,f(z,x)),y),f(x,f(z,y))) = x.
f(A,B) != f(B,A).
end_of_list.
]]></input>

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