dddddddddddddddddddddddddddddd
ffffffffffffffffffffffffff
vvvvvvvvvvvvvvvvvvvvvvvvvvvvv
ddddddddddddddddd
RRRRRRRRRRRRRRRRRRRRRR
rrrrrrrrrrrrrrrrrrrrrr
tttttttttttttttttttttttttttttttttt
vvvvvvvvvvvvvvvvvvvv
dddddddddddddddddddddddddddd
fffffffffffffffffffffff
eeeeeeeeeeeeeeeeeeeeeeee
fffffffffffffffffffffffffffffffffffff