using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("the seres are");

        int a = 1;

        Console.WriteLine(a);

         a += 4;

        Console.WriteLine(a);

         a += 4;

        Console.WriteLine(a);

         a += 4;

        Console.WriteLine(a);

         a += 4;

        Console.WriteLine(a);

         a += 4;

        Console.WriteLine(a);

         a += 4;

        Console.WriteLine(a);

         a += 4;

        Console.WriteLine(a);

    }

}