using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(1.ToString("#,###"));

        Console.WriteLine(12.ToString("#,###"));

        Console.WriteLine(123.ToString("#,###"));

        Console.WriteLine(1234.ToString("#,###"));

        Console.WriteLine(12345.ToString("#,###"));

        Console.WriteLine(123456.ToString("#,###"));

        Console.WriteLine(1234567.ToString("#,###"));

        Console.WriteLine(12345678.ToString("#,###"));

        Console.WriteLine(123456789.ToString("#,###"));

    }

}