rings

 *****    *****   *     *  *     *   *****    *****         *  
*     *  *     *   *   *   *     *  *     *  *     *        *  
*        *          * *    *     *  *        *     *        *  
 *****   *           *     *******  *        *     *        *  
      *  *   ***    * *    *     *  *   ***  *   * *        *  
*     *  *     *   *   *   *     *  *     *  *    *   *     *  
 *****    *****   *     *  *     *   *****    **** *   *****