l = [
"Never gonna give you up",
"Never gonna let you down",
"Never gonna run around and desert you",
"Never gonna make you cry",
"Never gonna say goodbye",
"Never gonna tell a lie and hurt you",
"Never gonna stop",
]
for _ in range(int(input())):
s = input()
if s not in l:
print("Yes")
break
else:
print("No")