using System;

public class Program

{

    public static void Main()

    {

        int a;

        Console.WriteLine("Enter an Individually number");

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

        if (a%2!=0)

         {

        for (int i1 = a; i1 >= 1; i1 -= 2)

            {

            for (int i2 = i1; i2 >= 1; i2--)

                {

                Console.Write("X");

                    }

                 Console.WriteLine();

                 for (int i3 = a+2-i1; i3 >= 1; i3 -=2)

                    {

                Console.Write(" ");

                }

          }

       }    

        else

        Console.WriteLine("the number is double ");

    }

}