MAYBE
33.73/10.35	MAYBE
33.73/10.36	
33.73/10.36	Problem:
33.73/10.36	 a(x1) -> x1
33.73/10.36	 a(b(x1)) -> b(b(a(a(c(x1)))))
33.73/10.36	 b(b(x1)) -> x1
33.73/10.36	 c(c(x1)) -> x1
33.73/10.36	
33.73/10.36	Proof:
33.73/10.36	 Open
33.73/10.36	EOF