using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(string.Format(new System.Globalization.CultureInfo("hi-IN"), "{0:#,#}", 123456));

        Console.WriteLine(string.Format(new System.Globalization.CultureInfo("hi-IN"), "{0:#,#}", 1234567));

        Console.WriteLine(string.Format(new System.Globalization.CultureInfo("hi-IN"), "{0:#,#}", 12345678));

        Console.WriteLine("Hello World");

    }

}