c ccc ccccccccc ccc
kkkkkkkk fffffffffffffffffffffffffffbvDvDvvvvvvvvb
    kkkkkkkkk
        P bDDDb tttttt
        P bDDDb tttttt
        ddddddddooBBBBBBDddddddddDdddddDdddddddddDddd
    kkk
    vvvvvvvvvvvv o BBBBBBBBBBBBBBbddddddddbD
    BBBbdDdDddddddddddddbDbb
kkk
