57                                                                   58                                                                59                                                                    60

                 5                                                                   6                                                                     7                                                                      8

                45                                                                    46                                                             47                                                                     48

               53                                                                  54                                                                55                                                                      56

              65                                                                   66                                                                67                                                                     68

                 21                                                                     22                                                                23                                                                  24

                 13                                                                    14                                                                 15                                                                       16

                33                                                                   34                                                               35                                                                   36

                49                                                                    50                                                              51                                                                   52

                 9                                                                    10                                                                   11                                                                        12

                 17                                                                    18                                                                 19                                                                        20

                                                                                 73                                                                   74                                                            

                 61                                                                     62                                                              63                                                                   64

                 25                                                                26                                                                   27                                                                  28

                 29                                                                    30                                                               31                                                                     32

                 41                                                                    42                                                               43                                                                   44

                 37                                                                    38                                                               39                                                                 40

                 1                                                                     2                                                                   3                                                                        4

             69                                                                  70                                                                 71                                                      72