MAYBE
133.24/55.38	MAYBE
133.24/55.38	
133.24/55.38	Problem:
133.24/55.38	 a(x1) -> b(x1)
133.24/55.38	 a(b(x1)) -> x1
133.24/55.38	 c(c(b(x1))) -> b(c(a(c(c(x1)))))
133.24/55.38	
133.24/55.38	Proof:
133.24/55.38	 Open
133.24/55.39	EOF