MAYBE
136.45/55.34	MAYBE
136.45/55.34	
136.45/55.34	Problem:
136.45/55.34	 a(a(a(x1))) -> b(x1)
136.45/55.34	 a(b(b(x1))) -> b(a(a(b(a(x1)))))
136.45/55.34	
136.45/55.34	Proof:
136.45/55.34	 Open
136.45/55.34	EOF