import java.util.*;
    class genericstack 
    {
        Stack  object = new Stack ();
	public void push(E obj)
        {
            object.push(obj);
	}
	public E pop()
        {
            E obj = object.pop();
	    return obj;
	}
    }
    
    public class Output
    {
        public static void main(String args[])
        {
            genericstack  genericObject = new genericstack();
            genericObject.push(50);
            System.out.println(genericObject.pop());
        }
    }