MAYBE
36.39/10.86	MAYBE
36.39/10.86	
36.39/10.86	Problem:
36.39/10.86	 a(x1) -> x1
36.39/10.86	 a(a(x1)) -> b(x1)
36.39/10.86	 b(x1) -> x1
36.39/10.86	 b(c(x1)) -> c(c(c(b(a(x1)))))
36.39/10.86	
36.39/10.86	Proof:
36.39/10.86	 Open
36.39/10.87	EOF