package com.Exam;

import java.util.Scanner;

public class Forest_Road {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int height = 2 * n - 1;
        int position = 0;


        String[][] arr = new String[n][height];

        for (int i = 0; i < n; i++) {
            for (int j = 0; j < height; j++) {
                if (i == j) {
                    arr[i][j] = "*";
                    System.out.print(arr[i][j] + " ");

                }
                else {
                    arr[i][j] = ".";
                    System.out.print(arr[i][j] + " ");
                }

            }
            System.out.println();
        }
    }
}