.

                                      G
                              o    o   d      o
                           d       i    v         d
                         i             a                i
                       v              G                 v
                      a                o                 a
                      G               d                  G
                      o            i       v              o
                       d           a      G            d
                         i            o   d             i
                            v           i             v
                               a        v         a
                                         a