MAYBE
33.10/10.31	MAYBE
33.10/10.31	
33.10/10.31	Problem:
33.10/10.31	 a(x1) -> x1
33.10/10.31	 a(b(x1)) -> b(b(a(c(a(x1)))))
33.10/10.31	 b(x1) -> x1
33.10/10.31	 c(b(c(x1))) -> x1
33.10/10.31	
33.10/10.31	Proof:
33.10/10.31	 Open
33.10/10.32	EOF