using System;

                    using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Stack<string> stack = new Stack<string>();

stack.Push("1. Ivan");

stack.Push("2. Nikolay");

stack.Push("3. Maria");

stack.Push("4. George");

Console.WriteLine("Top = " + stack.Peek());

while (stack.Count > 0)

{

string personName = stack.Pop();

Console.WriteLine(personName);

}

}

}