House

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            for (int i = 0; i <= n / 2; i++)
            {
                string outerDots = new string('.', n / 2 - i);
                if (i == 0)
                {
                    Console.WriteLine(outerDots + "*" + outerDots);
                }
                else
                {
                    string innerDots = new string('.', 2 * i - 1);
                    if (i == n /2)
                    {
                        string line = new string('*', n);
                        Console.WriteLine(line);
                    }
                    else
                    {
                        Console.WriteLine(outerDots + "*" + innerDots + "*" + outerDots);
                    }
                }
            }
            for (int j = 0; j < n / 2; j++)
            {
                string outerDots = new string('.', n / 4);
                string innerDots = new string('.', n - 2 - 2 * (n / 4));
                if (j == n / 2 - 1)
                {
                    string line = new string('*', n - 2 * (n / 4));
                    Console.WriteLine(outerDots + line + outerDots);
                }
                else
               {
                   Console.WriteLine(outerDots + "*" + innerDots + "*" + outerDots);
               }

            }
        }
    }
}