.

                                    L
                        ­  e       e  t       e
                        t          i   t          t
                      i              G              ­i
                     t               o                 t
                   L             L    e               L
                  e               t     i                e
                   t               t   G                 t
                    i                 o                  i
                     t                L                 t
                     G              e               G
                       o             t              o
                          L          i          ­ L
                             e        t       e
                                 t    G   t
                                      o