ccccccccccccccccccc
sssssssssssssssssssss
ccccccccccccccccccccc
dddddddddddddddddddddddddddd
ccccccccccccccccc
xxxxxxxxxxxxxxxxxxxxxxxx
vvvvvvvvvvvv
xvvvvvvvvvvvvvvvvvv
eeeeeeeeeeeeeeeeeeeeeeee
ddddddddddddddddddd
ssssssssssssssssssssssssssss
dddddddddddddddddddddddd