MAYBE
39.78/10.31	MAYBE
39.78/10.32	
39.78/10.32	Problem:
39.78/10.32	 a(x1) -> x1
39.78/10.32	 a(b(x1)) -> b(c(x1))
39.78/10.32	 b(x1) -> x1
39.78/10.32	 c(c(x1)) -> a(c(b(a(x1))))
39.78/10.32	
39.78/10.32	Proof:
39.78/10.32	 Open
39.78/10.32	EOF