c ccc ccccccccc ccc
kkkkkkkk fffffffffffffffffffffffbvvvD vvvvvvvvvvD vvvD vvvvvvvb
    kkkkkkkkk
        PPP bnDDb bBBBBBBBBBBBBBb
        BBBBBBBBBB tttttt
        PPP bnDnb tttttt
        PPPPPPPDPPP
        PPPPPPPDBBB tttttt
        PPPPPPPDPPPPPPPPP bnDnb tttttt o SsS
        PPPPPPPDPPPPPPPPP bnDnb bBBBBBBBBBBBBBb o n
    kkk
kkk
