#ExamEggcelent

using System;

class Eggcelent
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        char dots = '.';
        char stars = '*';

        //1
        Console.WriteLine("{0}{1}{0}", new string(dots, n+1), new string(stars, n-1));

        //2
        for (int i = 0; i < n/2; i++)
        {
            Console.WriteLine("{0}*{1}*{0}", new string(dots, (n-1-i*2)), new string(dots, (n+1+i*4)));
        }

        //3
        for (int i = 0; i < n * 3 + 1; i++)
        {
            if (i == 1 || i == 3 * n + 1 - 2)
            {
                Console.Write('*');
            }
            else if (i == 0 || i == 3 * n + 1 - 1)
            {
                Console.Write('.');
            }
            else if (i % 2 == 1 && i != 0 && i != 3 * n + 1 - 1)
            {
                Console.Write('.');
            }
            else
            {
                Console.Write('@');
            }
        }
        Console.WriteLine();
        for (int i = 0; i < n * 3 + 1; i++)
        {
            if (i == 1 || i == 3 * n + 1 - 2)
            {
                Console.Write('*');
            }
            else if (i % 2 == 1 && i != 0 && i != 3 * n + 1 - 1)
            {
                Console.Write('@');
            }
            else
            {
                Console.Write('.');
            }
        }
        Console.WriteLine();

        //4
        for (int i = n / 2 - 1; i >= 0; i--)
        {
            Console.WriteLine("{0}*{1}*{0}", new string(dots, (n - 1 - i*2)), new string(dots, (n + 1 + i * 4)));
        }

        //5
        Console.WriteLine("{0}{1}{0}", new string(dots, n + 1), new string(stars, n - 1));
    }
}