.
                                     V
                              o    o g     o
                            g      u e       g
                           u        V          u
                           e       o   g        e
                           V      u    e       V
                            o      V   o       o
                             g      g  u       g
                              u       e       u
                                   e  V   e
                                       o
                                       g
                                       u
                                       e