MAYBE
39.57/10.37	MAYBE
39.57/10.37	
39.57/10.37	Problem:
39.57/10.37	 a(x1) -> b(c(x1))
39.57/10.37	 a(b(b(x1))) -> b(b(a(a(x1))))
39.57/10.37	 b(a(x1)) -> x1
39.57/10.37	
39.57/10.37	Proof:
39.57/10.37	 Open
39.57/10.38	EOF