using System;

public class Program

{

    public static void Main()

    {

         int a,b;

            a = 2;

            b = 1;

            if (b > 11)

            {

                Console.WriteLine("Kelas" + b + ".D" + "\t" + "Kelas" + b + ".C" + "\t" + "Kelas" + b + ".B" + "\t" + "Kelas" + b + ".A");

​

            }

            while (a <= 10)

            {

                Console.WriteLine("Kelas" + a + ".D" + "\t" + "Kelas" + a + ".C" + "\t" + "Kelas" + a + ".B" + "\t" + "Kelas" + a + ".A");

                a= a+1; 

            } 

    }

}