MAYBE
40.42/10.66	MAYBE
40.42/10.66	
40.42/10.66	Problem:
40.42/10.66	 a(x1) -> x1
40.42/10.66	 a(b(b(x1))) -> b(b(b(c(x1))))
40.42/10.66	 b(c(x1)) -> a(a(x1))
40.42/10.66	
40.42/10.66	Proof:
40.42/10.66	 Open
40.42/10.66	EOF