MAYBE
155.26/55.35	MAYBE
155.26/55.35	
155.26/55.35	Problem:
155.26/55.35	 a(a(b(a(x1)))) -> a(b(b(x1)))
155.26/55.35	 b(b(x1)) -> b(a(a(a(x1))))
155.26/55.35	
155.26/55.35	Proof:
155.26/55.35	 Open
155.26/55.36	EOF