import sys

sys.setrecursionlimit(10 ** 6)
stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().strip()
nsa = lambda: list(stdin.readline().split())
mod = 10 * 7 + 7

n = ni()
A = ['ne', 'ushi', 'tora', 'u', 'tatsu', 'mi', 'uma', 'hitsuji', 'saru', 'tori', 'inu', 'i']
B = [0] * 12

for _ in range(n):
    a = ns()
    for i in range(12):
        if a == A[i]:
            B[i] += 1

if -(-n // 2) > max(B):
    print('YES')
else:
    print('NO')