// Simple program showing the use of a stack and queue.

import java.util.*;

public class StackQueue1 {
    public static void main(String[] args) {
        Queue<String> q = new LinkedList<String>();
        Stack<String> s = new Stack<String>();

        String[] data = {"four", "score", "and", "seven", "years", "ago"};
        for (String str : data) {
            s.push(str);
            q.add(str);
        }

        System.out.println("stack = " + s);
        while (!s.isEmpty())
            System.out.println(s.pop());

        System.out.println("queue = " + q);
        while (!q.isEmpty())
            System.out.println(q.remove());
    }
}