.

                                    A
                        ­     r     rt       r
                           t       Ar         t
                         A          t            A
                        r          A  r           r
           ­             t         t     A           t
                       A        r       t          A
                         r        A     r          r
                          t         t    A         t
                            A       r  t        A
                               r      A       r
                                   t   r    t
                                        t

.

                                     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
                                       ○
                                       ○
                                       ○

.

                                       B
                                a     ar     a
                             r       oq        r
                           o         u            o
                          q         e  B          q
                          u        a     r         u
                           B       o     q         B
                            r       u    e          r
                             o       B   a        o
                               k     r  o       k
                                  e     q     e
                                         u
                                         e

.

                                      F
                      ­         i      ir      i
                            r         e          r
                           e          F           e
                          F         i   r          F
                          i         e    F          i
                          r         r    e          r
                           e        F   i           e
                            F        r e           F
                              i         F          i
                                r       i         r
                                  e     r      e
                                         e

.

                                    r
                        ­  e      e p        e
                        p        e a          p
                       e           t              e
                      a         r     e           a
                      t         p      e           t
                      P         r      f           p
                       e        o     r           e
                        r        m  a           r
                         f         n  c          f
                          o         e          o
                             r       r        r
                               m   e   m
                                      p
                       ­               e
                                      a
        ­                              t

.

                                     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

.
                    
                                      C
                              r      ro      r
                           o         co        o
                          c           o            c
                         o           d             o
                         d         i     l          d
                         i          e     c          i
                          l          r   o           l
                           e         c  o          e
                            c          d           c
                              r         i          r
                                o       l       o
                                   c    e    c