Fir_Tree

using System;

    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());

            int left = N-1;
            int right = N-1;
            int center = N-1;


            for (int f = 1; f <= N; f++) {



                        if (f == N) {

                                for(int g = 1 ; g <= (2*N - 3); g++){

                                        if(g == center){

                                            Console.Write("*");



                                        }else{

                                            Console.Write(".");


                                        }




                                }




                        }
                        else{

                                    for (int i = 1; i <= (2 * N - 3); i++) {
                                        if (i >= left && i <= right)
                                        {

                                            Console.Write("*");


                                        }

                                        else {

                                            Console.Write(".");

                                        }




                                    }

                                    left--;
                                    right++;
                                    Console.WriteLine();

                        }





            }

            Console.WriteLine();
        }
    }