public class Dummy {
	Stack a = new ArrayStack(4);
	public Object pop(){return a.pop();}
    public void push(Object object){a.push(object);}
	public Object peek(){return a.peek();}

	public Object secondpop() {
		Object first = a.pop();
		Object second = a.pop();
		a.push(first);
		return second;
	}
}