using System;

​

public class Program

{

    public static void Main()

    {

        int n = int.Parse(Console.ReadLine());

        int[,] matrix = new int[n + 1, 2 * n];

​

        int curRow = n;

        int curCol = 0;

​

        while (curRow > 0)

        {

            matrix[curRow, curCol] = 1;

            curRow--;

            curCol++;

        }

​

        while (curCol < 2 * n)

        {

            matrix[curRow, curCol] = 1;

            curCol++;

        }

​

        curCol--;

​

        while (curRow < n + 1)

        {

            matrix[curRow, curCol] = 1;

            curRow++;

        }

​

        curRow--;

​

        while (curCol > 0)

        {

            matrix[curRow, curCol] = 1;

            curCol--;            

        }

        for (int i = 0; i < matrix.GetLength(0); i++)

        {

            for (int j = 0; j < matrix.GetLength(1); j++)

            {

                if (matrix[i, j] == 1)

                {

                    Console.Write("*");

                }

                else

                {

                    Console.Write(".");

                }

            }

            Console.WriteLine();

        }

    }

}