Stackable Ring

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