MAYBE
255.25/64.66	MAYBE
255.25/64.66	
255.25/64.66	Problem:
255.25/64.66	 active(f(0())) -> mark(cons(0(),f(s(0()))))
255.25/64.66	 active(f(s(0()))) -> mark(f(p(s(0()))))
255.25/64.66	 active(p(s(X))) -> mark(X)
255.25/64.66	 mark(f(X)) -> active(f(mark(X)))
255.25/64.66	 mark(0()) -> active(0())
255.25/64.66	 mark(cons(X1,X2)) -> active(cons(mark(X1),X2))
255.25/64.66	 mark(s(X)) -> active(s(mark(X)))
255.25/64.66	 mark(p(X)) -> active(p(mark(X)))
255.25/64.66	 f(mark(X)) -> f(X)
255.25/64.66	 f(active(X)) -> f(X)
255.25/64.66	 cons(mark(X1),X2) -> cons(X1,X2)
255.25/64.66	 cons(X1,mark(X2)) -> cons(X1,X2)
255.25/64.66	 cons(active(X1),X2) -> cons(X1,X2)
255.25/64.66	 cons(X1,active(X2)) -> cons(X1,X2)
255.25/64.66	 s(mark(X)) -> s(X)
255.25/64.66	 s(active(X)) -> s(X)
255.25/64.66	 p(mark(X)) -> p(X)
255.25/64.66	 p(active(X)) -> p(X)
255.25/64.66	
255.25/64.66	Proof:
255.25/64.66	 Open
255.25/64.66	EOF