.

                                     L
                             o    o   v     o
                           v      e   L       v
                         e          o             e
                       L            v               L
                      o             e                 o
                     v              L                  v
                     e           o     v               e
                     L           e      L             L
                       o           o  v              o
                         v           e              v
                             e        L          e
                                       o
                                       v
                                       e