// A program that demonstrates basic stack operations.

import java.util.*;

public class StackExample {
    public static void main(String[] args) {
        String[] data = {"to", "be", "or", "not", "to", "be"};
        Stack<String> s = new Stack<String>();

        for (String str : data) {
            s.push(str);
        }

        System.out.println("stack = " + s);
        System.out.println("size  = " + s.size());
        System.out.println("peek  = " + s.peek());
        while (!s.isEmpty()) {
            System.out.print(s.pop() + " ");
        }
        System.out.println();
    }
}