c ccc ccccccccc ccc
kkkkkkkk ffffffffffffffffffffff o BBBBBB
    kkkkkk
       PPPPPPPPPPP
    kkk
    kkkkkkk
       kkkkkkkk ffffffffffffbvvvb
          ddddddbdddDSsssssssssssSb
       kkk
    kkk
kkk
