MAYBE
36.87/10.36	MAYBE
36.87/10.36	
36.87/10.36	Problem:
36.87/10.36	 a(x1) -> x1
36.87/10.36	 a(a(b(x1))) -> c(a(x1))
36.87/10.36	 a(c(x1)) -> c(b(a(a(x1))))
36.87/10.36	
36.87/10.36	Proof:
36.87/10.36	 Open
36.87/10.37	EOF