2
a ba
b aa
b
abbbbbbb
0
` aa
b
`aaaa
0
ca bbb
bca aacd
da ede
cac
deeeeeeeec
10
b bca
c iac
c acf
d bec
e bhb
g g`f
g bae
h bah
h aaj
j bac
a
cbaaeeaba
-1
