using System;

public class Program

{

    public static Program Instance { get; } = new Program();

    public Program()

    {

        Console.WriteLine("Constructor!");

    }

    public static void Main()

    {

        Console.WriteLine(Instance.GetHashCode());

        Console.WriteLine(Instance.GetHashCode());

        Console.WriteLine(Instance.GetHashCode());

        Console.WriteLine(Instance.GetHashCode());

    }

}