using System;

public class Program

{

    public static void Main()

    {

        int num, space;

    while (true)

    {

        Console.Write("Enter a number between 1 and 15: ");

        num = Convert.ToInt32(Console.ReadLine());

        space = num - 1;

        for (int i = 1; i <= num; i++)

        {

            for (space = 1; space <= (num - 1); space++)

            {

                Console.Write(" ");

            }

            for (int j = 1; j <= i; j++)

            {

                Console.Write(j);

            }

            for (int s = (i - 15); s >= 2; s--)

            {

                Console.Write(s);

            }

                Console.WriteLine();

         }

      }

   }

}