.
                                    P
                           u     u t       u
                         t        y o         t
                        y         u r         y
                        o          l             o
                       u        e  g            u
                       r        s     o           r
                       l        n     m          l
                       e        y      s          e
                        g        h    o         g
                          s       u   l         s
                            o      de       o
                               n    r     n
                                      s