Figure.Boat

using System;
class Boat
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());

        char dot = '.';
        char star = '*';
        int firstDots = n - 1;
        int firstStars = 1;


        for (int i = 0; i < n/2; i++)
        {
            Console.WriteLine("{0}{1}{2}",
                new string (dot,firstDots),
                new string (star,firstStars),
                new string (dot,n));
                firstDots -= 2;
                firstStars += 2;
        }
        Console.WriteLine("{0}{1}",new string (star,n),new string (dot,n));
        for (int i = 0; i < n / 2; i++)
        {
            firstDots += 2;
            firstStars -= 2;
            Console.WriteLine("{0}{1}{2}",
                new string(dot, firstDots),
                new string(star, firstStars),
                new string(dot, n));

        }
        int lastdots = 0;
        int laststars = n * 2;
        for (int i = 0; i < n/2; i++)
        {
            Console.WriteLine("{0}{1}{0}", new string(dot, lastdots),new string(star, laststars));
            laststars -= 2;
            lastdots++;

        }
    }
}