.

                                     G
                             r      re       r
                          e         en         e
                         e           L            e
                        n         i    g          n
                        L        g     h          L
                         i         t     G         i
                          g        r   e         g
                            h        e          h
                               t       n       t
                                       ○
                                       ○
                                       ○