class Five {
  public static void main(String[] args) {
    Five.mystery(Integer.parseInt(args[0])); 
  } 
  public static void mystery(int size) {
    if (size <= 6) {
      return; // too small, won't draw it.
    }
    for (int i = 0; i < size; i++) {
      for (int j = 0; j < size; j++) {
        if (i == j || j == 0 || j == size-1)
          System.out.print("* ");
        else
          System.out.print("  ");
      }
      System.out.println();
    } 
  }
}