using System;

class Boat
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        int currentwidth = 1;
        bool middleReached = false;

        for (int i = 0; i < n; i++)
        {
            Console.Write(new string ('.',n - currentwidth));
            Console.Write(new string('*', currentwidth));
            Console.WriteLine(new string('.', n));
            if (currentwidth >= n)
            {
                middleReached = true;
            }
            if (middleReached)
            {
                currentwidth -= 2;
            }
            else
            {
                currentwidth += 2;
            }
        }

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