public class Main {
  private static void add(Stack s, String data) {
    Node n = new Node();
    n.data = data;
    n.link = s.top;
    s.top = n;
  }
  private static boolean hasMore(Stack s) {
    return (s.top != null);
  }
  private static String remove(Stack s) {
    Node n = s.top;
    s.top = n.link;
    return n.data;
  }
  public static void main(String[] args) {
    Stack s = new Stack();
    add(s,"able");
    add(s,"charlie");
    add(s,"baker");
    while (hasMore(s)) {
      System.out.println(remove(s));
    }
  }
}