ForestRoad

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

class forestRoad
{
    static void Main(string[] args)
    {
        byte N = byte.Parse(Console.ReadLine());
        if (N < 1 || N > 80)
        {
            return;
        }
        uint heith = (uint)2 * N - 1;
        int pointsBeforeCount = 0;
        int pointsAfterCount = N - 1;
        string direction = "right";
        string pointsBefore = "";
        string pointsAfter = "";
        for (int i = 1; i <= heith; i++)
        {
            if (direction.Equals("right"))
            {
                pointsBefore = new string('.', pointsBeforeCount);
                pointsAfter = new string('.', (N - (pointsBeforeCount + 1)));
                pointsBeforeCount++;
                if (pointsBeforeCount == N)
                {
                    pointsBeforeCount = N - 2;
                    direction = "left";
                }
            }
            else if (direction.Equals("left"))
            {
                pointsBefore = new string('.', pointsBeforeCount);
                pointsAfter = new string('.', (N - (pointsBeforeCount + 1)));
                pointsBeforeCount--;
                if (pointsBeforeCount == 0)
                {
                    pointsBeforeCount = 0;
                    direction = "right";
                }
            }


            Console.WriteLine("{0}*{1}", pointsBefore, pointsAfter);
        }
    }
}