class hollowPyramid {

  public static void main(String[] args) {

    // size of the pyramid

    int size = 5;

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

      // print spaces

      for (int j = 0; j < size - i - 1; j++) {

        System.out.print(" ");

      }

      // print stars

      for (int k = 0; k < 2 * i + 1; k++) {

        if (i == 0 || i == size - 1) {

          System.out.print("*");

        }

        else {

          if (k == 0 || k == 2 * i) {

            System.out.print("*");

          }

          else {

            System.out.print(" ");

          }

        }

      }

      System.out.println();

    }

  }

}