                                                                                      

                                                                

                                                  

                       27                                     3*3*3=27    

  111111111222  

  111222333111 

  123123123123 

27                    1.1.     1/27              26   26/27               26/27   96.3%  

                                                                

                                                                             

                                                                                                 