import java.util.Stack;
import java.util.Enumeration;

final class CopiaStack implements Enumeration{
    Stack copia;
 
    CopiaStack(Stack s){
	copia=(Stack) s.clone();
    }

    public boolean hasMoreElements(){
	return !copia.empty();
    }

    public Object nextElement(){
	Object o= copia.peek();
	copia.pop();
	return o;
    }
}
public class StackEnumeravel extends Stack{

    public Enumeration elements(){
	return new CopiaStack(this);
    }
   
}