MAYBE
106.75/55.31	MAYBE
106.75/55.31	
106.75/55.31	Problem:
106.75/55.31	 a(x1) -> b(x1)
106.75/55.31	 a(b(x1)) -> x1
106.75/55.31	 b(c(c(x1))) -> c(c(b(c(a(x1)))))
106.75/55.31	
106.75/55.31	Proof:
106.75/55.31	 Open
106.75/55.32	EOF