MAYBE
137.94/55.35	MAYBE
137.94/55.35	
137.94/55.35	Problem:
137.94/55.35	 a(a(b(x1))) -> c(b(a(a(a(x1)))))
137.94/55.35	 a(c(x1)) -> b(a(x1))
137.94/55.35	
137.94/55.35	Proof:
137.94/55.35	 Open
137.94/55.35	EOF