using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Size bánh chưng");

        int Number = Convert.ToInt32(Console.ReadLine());

        for (int i=0;i<=Number;i++){            

            for(int j=0;j<=Number;j++){

                 Console.Write( ( (i==0) || (i==Number) || (i==(Number/2)) ||  (j==0) || (j==Number) || (j==i) || (j==Number/2) || (i+j==Number))?"*":" ");     

            }

             Console.WriteLine("");

        }

    }

}