SandClock

using System;
class SandClock
{
    static void Main()
    {
        string inputVar = Console.ReadLine();
        int clockHeight = int.Parse(inputVar);

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

        for (int i = clockHeight / 2 - 1; i >= 0; i--)
        {
            string dots = new string('.', i);
            string stars = new string('*', clockHeight - 2 * i);
            Console.WriteLine("{0}{1}{2}", dots, stars, dots);
        }

    }
}