                                                                                                                                                                                                                                                                                                                                                                 500                                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                         45                              60                           30     31                                                                                11             1000                                                                                                                                                                                  12                                          
                                                                                                                                                        
                                                                            8            8                                                                        