import java.util.Scanner;

public class Crown {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int n = Integer.parseInt(scan.nextLine());

        //FirstPart
        int space = n - 2;
        System.out.printf("@%s@%s@%n",
                repeatStr(" ", space),
                repeatStr(" ", space));
        //SecondPart
        space--;
        System.out.printf("**%s*%s**%n",
                repeatStr(" ", space),
                repeatStr(" ", space));

        //ThirdPart
        int end = (n / 2 - 1) - 1;
        space -= 2;
        int midPonits = 1;
        int leftPoints = 1;

        for (int row = 1; row <= end; row++) {
            System.out.printf("*%s*%s*%s*%s*%s*%n",
                    repeatStr(".", leftPoints),
                    repeatStr(" ", space),
                    repeatStr(".", midPonits),
                    repeatStr(" ", space),
                    repeatStr(".", leftPoints));
            midPonits += 2;
            leftPoints++;
            space -= 2;
        }
        //FourthPart
        System.out.printf("*%s*%s*%s*%n",
                repeatStr(".", leftPoints),
                repeatStr(".", midPonits),
                repeatStr(".", leftPoints));
        midPonits = (midPonits - 1) / 2;
        leftPoints++;

        //FifthPart
        System.out.printf("*%s%s.%s%s*%n",
                repeatStr(".", leftPoints),
                repeatStr("*", midPonits),
                repeatStr("*", midPonits),
                repeatStr(".", leftPoints));
        int weigt = (2 * n) - 1;

        //LastPart
        for (int i = 0; i < 2; i++) {
            System.out.printf("%s%n", repeatStr("*", weigt));
        }
    }

    static String repeatStr(String strToRepeat, int count) {
        String text = "";

        for (int i = 0; i < count; i++) {
            text = text + strToRepeat;
        }

        return text;
    }
}