2
a bb
b aa
a
bbbbbbbb
1
a aa
b
aaaaa
3
bb aab
bca aadc
ad dee
bac
deeeeeeeec
10
a bca
b bai
c acf
d bec
e bbh
f fag
g abe
h bah
i aaj
j bab
a
abaceaabe
0
