.

                                     L
                            e      e o       e
                         o         p a          o
                        p          rd             p
                       a            L               a
                       r           e   o             r
                      d          p      a           d
                       l           r      d           l
                        e         L     e           e
                         o         o    p         o
                           p        a  r         p
                             a        d         a
                               r      ♢       r
                                  d   ♢  d