using System;


class Program
{
    static void Main()
    {
        int size = int.Parse(Console.ReadLine());
        int spaces = (size - 1) / 2;
        int forTop = size + 1;
        int neckSpaces = (size + 1) - 2;
        int heightNeck = (size + 1) / 2;
        int cone = (size - 3) / 2;

        string topSpaces = new string(' ', spaces);
        string top = new string('*', forTop);
        string neck = new string(' ', neckSpaces);
        Console.WriteLine(topSpaces + top + topSpaces);

        for (int h = 0; h < heightNeck; h++)
        {
            Console.WriteLine(topSpaces + "*" + neck + "*" + topSpaces);
        }

        for (int c = 1; c <= cone; c++)
        {

            int spaceIn = (size - 1 + c * 2);
            int spaceOut = (((size - 1) / 2) - c);
            string spacesIn = new string(' ', spaceIn);
            string spacesOut = new string(' ', spaceOut);

            Console.WriteLine(spacesOut + "*" + spacesIn + "*" + spacesOut);
        }

        //bubbles
        for (int f = 0; f < size; f++)
        {
            string froath = new string('.', (size - 1) * 2);
            Console.WriteLine("*" + froath + "*");
        }
        //beer
        for (int b = 0; b < size; b++)
        {
            string beer = new string('@', (size - 1) * 2);
            Console.WriteLine("*" + beer + "*");
        }

        string bottom = new string('*', size * 2);
        Console.WriteLine(bottom);
    }
}