MAYBE
39.60/10.33	MAYBE
39.60/10.33	
39.60/10.33	Problem:
39.60/10.33	 a(b(x1)) -> x1
39.60/10.33	 a(c(x1)) -> c(b(c(c(x1))))
39.60/10.33	 b(c(x1)) -> a(b(x1))
39.60/10.33	
39.60/10.33	Proof:
39.60/10.33	 Open
39.60/10.34	EOF