                                                                                              
                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                       
                                                                                                                                                                                               5  6                                                                                            1 2                   
                                                                         
                                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                   
                                                                                                                                                                                                                                                      
                                                                                    97                        150                                                                                                                                                                            
                                                                                                                                     
                                                                                                                                                                                                          
                                                   