MAYBE
270.44/68.87	MAYBE
270.44/68.87	
270.44/68.87	Problem:
270.44/68.87	 a__incr(nil()) -> nil()
270.44/68.87	 a__incr(cons(X,L)) -> cons(s(mark(X)),incr(L))
270.44/68.87	 a__adx(nil()) -> nil()
270.44/68.87	 a__adx(cons(X,L)) -> a__incr(cons(mark(X),adx(L)))
270.44/68.87	 a__nats() -> a__adx(a__zeros())
270.44/68.87	 a__zeros() -> cons(0(),zeros())
270.44/68.87	 a__head(cons(X,L)) -> mark(X)
270.44/68.87	 a__tail(cons(X,L)) -> mark(L)
270.44/68.87	 mark(incr(X)) -> a__incr(mark(X))
270.44/68.87	 mark(adx(X)) -> a__adx(mark(X))
270.44/68.87	 mark(nats()) -> a__nats()
270.44/68.87	 mark(zeros()) -> a__zeros()
270.44/68.87	 mark(head(X)) -> a__head(mark(X))
270.44/68.87	 mark(tail(X)) -> a__tail(mark(X))
270.44/68.87	 mark(nil()) -> nil()
270.44/68.87	 mark(cons(X1,X2)) -> cons(mark(X1),X2)
270.44/68.87	 mark(s(X)) -> s(mark(X))
270.44/68.87	 mark(0()) -> 0()
270.44/68.87	 a__incr(X) -> incr(X)
270.44/68.87	 a__adx(X) -> adx(X)
270.44/68.87	 a__nats() -> nats()
270.44/68.87	 a__zeros() -> zeros()
270.44/68.87	 a__head(X) -> head(X)
270.44/68.87	 a__tail(X) -> tail(X)
270.44/68.87	
270.44/68.87	Proof:
270.44/68.87	 Open
270.44/68.87	EOF