MAYBE
34.94/10.31	MAYBE
34.94/10.31	
34.94/10.31	Problem:
34.94/10.31	 a(x1) -> x1
34.94/10.31	 a(b(x1)) -> b(b(c(a(x1))))
34.94/10.31	 b(x1) -> x1
34.94/10.31	 b(c(c(x1))) -> a(x1)
34.94/10.31	
34.94/10.31	Proof:
34.94/10.31	 Open
34.94/10.31	EOF