bkcdf
ckcdfi
dkcd
ekcdf
fkcdfi
0addfi
1add
2addf
3addfi
4add
p1dd
q1ddf
r1ddfi
s1dd
t1ddf
esedf
fsedfi
gsed
hsedf
isedfi
3ifdfi
4ifd
5ifdf
6ifdfi
7ifd