.
                                    H
                            o      on      o
                   ­       n        ey         n
                        e          do            e
            ­           y            H              y
                      d            ­ o                d
                      o           n    e             o
                     H          y      d            H
                      o           o    H            o
                       n          o    n           n
                         e          e  y           e
                           y          d          y
                              d       o       d
                                  o    !    o