.
                                     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