MAYBE
33.82/10.30	MAYBE
33.82/10.30	
33.82/10.30	Problem:
33.82/10.30	 a(x1) -> x1
33.82/10.30	 a(b(x1)) -> b(b(c(a(x1))))
33.82/10.30	 b(b(x1)) -> a(x1)
33.82/10.30	 c(c(x1)) -> x1
33.82/10.30	
33.82/10.30	Proof:
33.82/10.30	 Open
34.08/10.30	EOF