MAYBE
53.10/19.96	MAYBE
53.10/19.96	
53.10/19.96	Problem:
53.10/19.96	 a(x1) -> b(b(c(x1)))
53.10/19.96	 c(b(b(x1))) -> a(b(c(x1)))
53.10/19.96	 c(c(x1)) -> x1
53.10/19.96	
53.10/19.96	Proof:
53.10/19.96	 Open
53.10/19.97	EOF