                                                                                                                             ︾                                  ︽                                                                                                                                  ︵  ︶                      ︾     ︶         ︵        ︽         ︾                           ︽                                                                                   ︵  ︶       ︾     ︵  ︶                      ︾    ︽             ︽      ︽     ︾         ︶                 ︵                                                                              ︵  ︶    ︵  ︶   ︶         ︶      ︵         ︵                                                                                              