import java.util.Scanner;

    public class Testoo
    {
            private static Scanner keyboard;
            static int number = 0;

            public static void main(String[] args)
            {
                    keyboard = new Scanner(System.in);

                    while(true)
                    {
                    System.out.println("Enter the amouth of lines you want to your diamond: ");
                    String d = keyboard.nextLine();
                    if(Terve(d) == true)
                    {
                        number = Integer.parseInt(d);
                        d= "";
                    for(int x = 1; x <= number; x=x+2)
                    {
                            for (int y = 0; y < (number - x / 2); y++)
                              System.out.print(" ");

                            for (int y = 0; y < x; y++)
                              System.out.print("*");

                            System.out.println();
                    }
                    if (number%2==0)
                    {
                    for(int x = number-1; x > 0; x=x-2)
                    {
                                for (int y = 0; y < (number - x / 2); y++)
                                  System.out.print(" ");

                                for (int y = 0; y < x; y++)
                                  System.out.print("*");

                                System.out.println();
                    }
                    }
                    else
                    {
                    for(int x = number-2; x > 0; x=x-2)
                    {
                            for (int y = 0; y < (number - x / 2); y++)
                              System.out.print(" ");

                            for (int y = 0; y < x; y++)
                              System.out.print("*");

                            System.out.println();
                    }
                   }
                  }
                    else if(d.length() == 0)
                    {
                        System.out.println("You entered nothing. Program will now terminate");
                        break;

                    }
                 }
            }

            public static boolean Terve(String d)
            {

                     try
                     {
                         Integer.parseInt(d);
                         return true;
                      } catch(NumberFormatException nfe)
                      {
                          return false;
                      }


            }
    }