.

                                       A
                             n      n   g       n
                          g          e   r          g
                         e             A              e
                        r              n                r
                       A               g                A
                       n               e                 n
                       g            r     A             g
                        e           n      g            e
                         r           e    r             r
                          A           An            A
                            n           g            n
                               g         e         g
                                 e       r       e
                                     r          r