197.54/50.48	MAYBE
197.54/50.48	
197.54/50.48	Problem:
197.54/50.48	 a(a(a(b(b(x1))))) -> b(b(b(x1)))
197.54/50.48	 b(a(a(a(b(x1))))) -> a(a(a(b(a(a(a(x1)))))))
197.54/50.48	 a(a(a(x1))) -> a(a(x1))
197.54/50.48	 b(b(x1)) -> a(b(a(x1)))
197.54/50.48	
197.54/50.48	Proof:
197.54/50.48	 Open
197.54/50.48	EOF