using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Please write a number between 1 and 9: ");

        int a = int.Parse(Console.ReadLine());

        switch (a)

        {

            case 1:

            case 2:

            case 3:

                Console.WriteLine("The BONUS score is: " + (a * 10));

                break;

            case 4:

            case 5:

            case 6:

                Console.WriteLine("The BONUS score is: " + (a * 100));

                break;

            case 7:

            case 8:

            case 9:

                Console.WriteLine("The BONUS score is: " + (a*1000));

                break;

            default:

                Console.WriteLine("Invalid Score!");

                break;

        }

    }

}