MAYBE
154.65/55.34	MAYBE
154.65/55.34	
154.65/55.34	Problem:
154.65/55.34	 a(b(a(x1))) -> b(b(b(x1)))
154.65/55.34	 b(a(b(x1))) -> a(b(a(x1)))
154.65/55.34	
154.65/55.34	Proof:
154.65/55.34	 Open
154.65/55.35	EOF