      
                                                                             
    〈46   〉                       46    12                 10   20                                                                                                                              《          》                        
                 《  》                                                
                                                  〈                〉
                       10       30              〈           …〉           
                       …                                 
                                                        
                         〈               〉
                                              
                                    8    
                                                                                                                                                        