9 4
r
aaaaaaaaa
bbbbbbbbb
ccccccccc
ddddddddd
eeeeeeeee
fffffffff
ggggggggg
hhhhhhhhh
iiiiiiiii
c
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
abcdefghi
b
aaaabbbbb
acccbdddb
acccedddb
acccedddb
aaeeeeeff
ghhheiiif
ghhheiiif
ghhhgiiif
gggggffff
a
aaabbbccc
aaabbbccc
aaabbbccc
dddeeefff
dddeeefff
dddeeefff
ggghhhiii
ggghhhiii
ggghhhiii