.
                
                                     E
                            v     v  e     v
                         e        y  d        e
                       r           a  y           r
                     y              E               y
                    d               v                d
                    a               e                 a
                    y               r                 y
                    E            y     d            E
                      v          a      y          v
                        e          E   v         e
                           r          e          r
                               y      r      y
                                       y
                                       d
                                       a
                                       y