Plane

using System;

    class Program
    {
        //..........*..........
        //.........*.*.........
        //........*...*........
        //.......*.....*.......
        //......*.......*......
        //.....*.........*.....
        //...*.............*...
        //.*.................*.
        //*.....*.......*.....*
        //*...*.*.......*.*...*
        //*.*...*.......*...*.*
        //......*.......*......
        //.....*.........*.....
        //....*...........*....
        //...*.............*...
        //..*...............*..
        //.*.................*.
        //*********************

        static void Main(string[] args)
        {

            int n = int.Parse(Console.ReadLine());
            int outDots = (3*n-1)/2;
            Console.WriteLine("{0}*{0}", new string('.', outDots));
            int dots = outDots-1;
            int innerDots = 1;
            for (int i = 1; i <= (n+2); i+=2)
            {
                Console.WriteLine("{0}*{1}*{0}", new string('.', dots),
                                                  new string('.', innerDots));
                dots--;
                innerDots+=2;
            }
            for (int i = 1; i < n-2; i += 2)
            {
                Console.WriteLine("{0}*{1}*{0}", new string('.',dots-i),
                                                  new string('.', innerDots+2*i));

            }
            Console.WriteLine("*{0}*{1}*{0}*", new string('.', n - 2),
                                                  new string('.', n));
            for (int i = 1; i <n-2; i +=2)
            {
                Console.WriteLine("*{0}*{1}*{2}*{1}*{0}*", new string('.', n-3-i),
                                                  new string('.', i),
                                                  new string('.', n));
            }
            for (int i = 0; i < n-1; i++)
            {
                 Console.WriteLine("{0}*{1}*{0}", new string('.', n-1-i),
                                                  new string('.', n+2*i));
            }
            Console.WriteLine("{0}", new string ('*',3*n));

        }
    }