2
a bb
b aa
a
bbbbbbbb
1
a aa
c
aaaaa
0
bb aab
bca aadc
ad eed
bac
deeeeeeeec
10
b bca
c bai
c acf
d bec
e bbh
g fag
g aae
h bag
i aaj
j cab
a
abaceaabe
0
