196.36/50.13	MAYBE
196.36/50.13	
196.36/50.13	Problem:
196.36/50.13	 a(x1) -> b(x1)
196.36/50.13	 a(b(x1)) -> c(a(c(a(x1))))
196.36/50.13	 c(b(c(x1))) -> b(x1)
196.36/50.13	
196.36/50.13	Proof:
196.36/50.13	 Open
196.36/50.13	EOF