using System;

public class Program

{

    public static void Main()

    {

        int FirstNumber = 5;

        int SecondNumber = 10;

        Console.WriteLine("1st Number =");

        Console.WriteLine( FirstNumber);

        Console.WriteLine( "2nd Number = ");

        Console.WriteLine(SecondNumber);

        Console.WriteLine("swapping start : ");

        FirstNumber=SecondNumber;

        Console.WriteLine("1st Number =");

        Console.WriteLine(FirstNumber);

        FirstNumber = 5;

        SecondNumber=FirstNumber;

        Console.WriteLine( "2nd Number = ");

        Console.WriteLine(SecondNumber);

    }

}