            

                ①           ②         ③         ④           ⑤        ⑥                                      
                                                                                                                              ①②③④                                                                            ①                                                                                                              ② ③                                 ④                                                                                                                                                                          
   ⑤   ⑥                                                                                       
                                                                                                               
                         