input:

149
10 m
christmasa
christmasx
21 a
ithinkthereforeisleep
ithinkthereforeithink
3 z
tcs
tcz
6 m
spring
winter
8 b
aaaaaaaa
aaaaaaac
9 l
aaabbbccc
xxxyyyzzz
14 c
abcaxzzzzzzzzz
abcayyyyyyyyyy
10 a
christmasa
christmasx
16 x
abcabcxyyyyzlmnt
abcabcxyyyyzlmob
11 q
qwertyaaaau
qwertyaaaba
12 z
nomnomnom...

output:

christmasm
ithinkthereforeitaaaa
NO
tmmmmm
aaaaaaab
lllllllll
abcayccccccccc
NO
NO
NO
NO
NO
NO
NO
y
NO
x
r
v
t
u
x
p
y
k
k
p
w
o
r
f
s
y
f
y
p
NO
p
g
o
k
y
m
NO
t
v
r
w
n
o
e
i
o
l
x
q
i
q
o
u
c
NO
h
n
f
f
j
w
y
s
v
y
h
i
n
NO
t
s
l
v
m
v
u
r
m
j
t
v
t
h
k
q
x
h
t
x
f
w
u
NO
y
t
w
w
y
t
g
u
y
NO
r
i...

result:

wrong answer Contestant did not find a solution, but jury did.