9 5
r
aaaaaabbb
bbbbbbccc
ccccccddd
ddddddeee
aaaeeeeee
.........
.........
.........
.........
c
bbbaaaaaa
cccbbbbbb
dddcccccc
eeedddddd
eeeeeeaaa
.........
.........
.........
.........
a
abccbddbe
aaccbddee
aaccbddee
abccbddbe
aaacbdeee
.........
.........
.........
.........