.          
                                      W
                             o     o  m     o
                         m        a   n         m
                        a            W              a
                      n               o                 n
                     W              m                W
                      o            a    n               o
                      m          W    o             m
                        a          m   a             a
                          n         n W          n
                             W       o         W
                                  o    m     o
                                         a
                                         n