MAYBE
147.94/55.35	MAYBE
147.94/55.35	
147.94/55.35	Problem:
147.94/55.35	 a(a(x1)) -> x1
147.94/55.35	 a(b(a(b(x1)))) -> b(a(b(b(a(a(x1))))))
147.94/55.35	
147.94/55.35	Proof:
147.94/55.35	 Open
147.94/55.35	EOF