275.80/49.93	MAYBE
275.80/49.93	
275.80/49.93	Problem:
275.80/49.93	 a(x1) -> x1
275.80/49.93	 a(b(x1)) -> b(a(c(a(x1))))
275.80/49.93	 c(b(x1)) -> x1
275.80/49.93	 c(c(x1)) -> b(x1)
275.80/49.93	
275.80/49.93	Proof:
275.80/49.93	 Open
275.80/49.94	EOF