#include <iostream>
#include <string>
using namespace std;

int main() {

    int number;
    cin >> number;

    int width = 2 * number - 1;
    int height = number / 2 + 4;

    cout << "@";
    cout << string(width / 2 - 1, ' ');
    cout << "@";
    cout << string(width / 2 - 1, ' ');
    cout << "@" << endl;

    cout << "**";
    cout << string(width / 2 - 2, ' ');
    cout << "*";
    cout << string(width / 2 - 2, ' ');
    cout << "**" << endl;

    int spaces = number - 5;

    int middle = 1;
    for (int i = 1; i <= number / 2 - 2; i++)
    {
        cout << "*";
        cout << string(i, '.');
        cout << "*";
        cout << string(spaces, ' ');
        cout << "*";
        cout << string(middle, '.');
        cout << "*";
        cout << string(spaces, ' ');
        cout << "*";
        cout << string(i, '.');
        cout << "*" << endl;
        spaces -= 2;
        middle += 2;
    }

    int firstPoints = number / 2 - 1;
    cout << "*";
    cout << string(firstPoints, '.');
    cout << "*";
    cout << string(width - (2 * firstPoints + 4), '.');
    cout << "*";
    cout << string(firstPoints, '.');
    cout << "*" << endl;


    cout << "*";
    cout << string(number / 2, '.');
    cout << string((number - 4) / 2, '*');
    cout << '.';
    cout << string((number - 4) / 2, '*');
    cout << string(number / 2, '.');
    cout << "*" << endl;

    for (int i = 0; i < 2; i++)
    {
        cout << string(width, '*') << endl;
    }

    return 0;
}