                                             c
                      ##                     c
                                             c
        ##       D     #B                   -c
       aaaa     aaaa aaaaa                 aac
   #B                          aa    #       c
  aaa                              aaa       c
                                             #
c$#  A#            BC                        c
aaa aaaaa    a   aaaaaaaaa            a      c
  v      #                 a                 c
           #      #          a #            #c
      ##  aa a   aaaa  aaaa     a          aac
#     aa                         a   aa      c
a   u                                      c
   +      aaa          B#       C #          c
aaaaaa           aaaaaaaaa   aaaaaa aaa     Pc
            bb b            aa              cc