197.91/50.45	MAYBE
197.91/50.45	
197.91/50.45	Problem:
197.91/50.45	 b(b(b(x1))) -> a(a(b(x1)))
197.91/50.45	 b(a(a(x1))) -> a(a(b(x1)))
197.91/50.45	 a(a(x1)) -> b(a(b(x1)))
197.91/50.45	
197.91/50.45	Proof:
197.91/50.45	 Open
197.91/50.46	EOF