vvvvvvvvvvvvvvvvvv
cccccccccccccccc
vvvvvvvvvvvvvvvvv
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
vvvvvvvvvvvvvvvvvvvvv
ffffffffffffffff
gggggggggggggggggg
bbbbbbbbbbbbbbbbbbbbbbbbbb
nnnnnnnnnnnnnnnnnnnnnnnnnnnnn