1
aaaaaaaaaaaaaa
c
b
d
2
bbbbbbbbbbbbbbbbbbbbb
aaaaaaaaaaaaaaaaaaa
ccccccccccccccccccccccccccc
3
dddddddddddddddddddddddd
ddddddddddddddddddddd
vvvvvvvvvvvvvvvvvvvvvvvvvv
ccccccccccccccccccc
4
aaaaaaaaaaaaaaaaaaaaaaaaaaaa
ddddddddddddddddddddddddddd
ffffffffffffffffffffffffffffffffffffffffffffffff
5
sssssssssssssssssssssssssssssssssssssssssssssss
eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
cccccccccccccccccccccccccccccccccccccc
