Trapezoid

using System;

namespace Task03Trapezoid
{
    class Program
    {
        static void Main(string[] args)
        {
            int width = int.Parse(Console.ReadLine());
            Console.WriteLine("{0}{1}", new string('.', width), new string('*', width));
            for (int i = 0; i < width - 1; i++)
            {
                Console.WriteLine("{0}*{1}*", new string('.', (width - 1) - i), new string('.', (width - 1) + i));
            }

            Console.WriteLine(new string('*', width * 2));
        }
    }
}