using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Globalization;
namespace numsTo100inText
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            int hash = (4 * n) + 1;
            int dots = 1;
            int spaces = 1;
            int leftHash = n * 2 - 1;

            int seconDots = n + 1;
            int secontHash = n * 2 - 1;
            Console.WriteLine(new string('#',hash));
            hash -= 2;

            for (int i = 1; i <= n/2; i++)
            {
                  Console.WriteLine(new string('.', dots) + new string('#', leftHash) + new string(' ', spaces) + new string('#', leftHash) + new string('.', dots));
                    dots++;
                    leftHash -= 2;
                    spaces += 2;


                }



                Console.WriteLine(new string('.', dots) + new string('#', leftHash) + new string(' ', n / 2 - 1) + "(@)" + new string(' ', n / 2 - 1) + new string('#', leftHash) + new string('.', dots));
                dots++;
                leftHash -= 2;
                spaces += 2;
            for (int i = n/2; i <=n-2; i++)
            {
                Console.WriteLine(new string('.', dots) + new string('#', leftHash) + new string(' ', spaces) + new string('#', leftHash) + new string('.', dots));
                dots++;
                leftHash -= 2;
                spaces += 2;

            }

            Console.WriteLine(new string('.', seconDots) + new string('#', secontHash) + new string('.', seconDots));
            for (int i = 2; i <=n; i++)
            {
                seconDots++;
                secontHash -= 2;
                Console.WriteLine(new string('.', seconDots) + new string('#', secontHash) + new string('.', seconDots));
            }

        }
    }
}