.

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