using System;

namespace Eggcelent
{
    class Eggcelent
    {
        static void Main()
        {
            int N = Int32.Parse(Console.ReadLine());
            int stars = N - 1;
            int drawingArea = (3 * N) + 1;
            int vertical = (N / 2) - 2;
            int height = N - (2 + vertical);
            int dotsEnd = (drawingArea - stars) / 2;
            int dotsMiddle = N + 1;

            //first line of egg
            Console.Write(new string('.', dotsEnd));
            Console.Write(new string('*', stars));
            Console.Write(new string('.', dotsEnd));
            Console.WriteLine();

            //the lines below the first line
            dotsEnd -= 2;

            for (int i = 0; i < height; i++)
            {
                Console.Write(new string('.', dotsEnd));
                Console.Write('*');
                Console.Write(new string('.', dotsMiddle));
                Console.Write('*');
                Console.Write(new string('.', dotsEnd));
                Console.WriteLine();

                dotsEnd -= 2;
                dotsMiddle += 4;
            }

            //loop for the line(s) just above the monkey symbols with 1 dotsEnd
            dotsMiddle = drawingArea - 4;

            for (int i = 0; i < vertical; i++)
            {
                Console.Write('.');
                Console.Write('*');
                Console.Write(new string('.', dotsMiddle));
                Console.Write('*');
                Console.Write('.');
                Console.WriteLine();
            }

            //the two lines with monkey symbols
            int monkeyCounter = 2;
            Console.Write('.');
            Console.Write('*');
            //first line of monkey symbols
            for (int i = 0; i < (drawingArea - 4); i++)
            {
                if (monkeyCounter % 2 == 0)
                {
                    Console.Write('@');
                }
                else
                {
                    Console.Write('.');
                }
                monkeyCounter++;
            }

            Console.Write('*');
            Console.Write('.');
            Console.WriteLine();
            //second line of monkey symbols
            monkeyCounter = 2;
            Console.Write('.');
            Console.Write('*');

            for (int i = 0; i < (drawingArea - 4); i++)
            {
                if (monkeyCounter % 2 == 0)
                {
                    Console.Write('.');
                }
                else
                {
                    Console.Write('@');
                }
                monkeyCounter++;
            }

            Console.Write('*');
            Console.Write('.');
            Console.WriteLine();

            //loop for the line(s) just below the monkey symbols with 1 dotsEnd
            dotsMiddle = drawingArea - 4;

            for (int i = 0; i < vertical; i++)
            {
                Console.Write('.');
                Console.Write('*');
                Console.Write(new string('.', dotsMiddle));
                Console.Write('*');
                Console.Write('.');
                Console.WriteLine();
            }

            //main part of the bottom of the egg
            dotsEnd = 1;
            dotsMiddle = drawingArea - 4;
            for (int i = 0; i < height; i++)
            {
                Console.Write(new string('.', dotsEnd));
                Console.Write('*');
                Console.Write(new string('.', dotsMiddle));
                Console.Write('*');
                Console.Write(new string('.', dotsEnd));
                Console.WriteLine();

                dotsEnd += 2;
                dotsMiddle -= 4;
            }

            //the last line
            dotsEnd = (drawingArea - stars) / 2;
            Console.Write(new string('.', dotsEnd));
            Console.Write(new string('*', stars));
            Console.Write(new string('.', dotsEnd));
            Console.WriteLine();
        }
    }
}