yes = [1 for _ in range(10)]
no = [0 for _ in range(10)]

n = int(input())

for i in range(n):
    data = list(map(str, input().split()))

    if data[4] =='YES':
        for number in data[0:4]:
            yes[int(number)] += 1
    else:
        for number in data[0:4]:
            no[int(number)] += 1

for i, n in enumerate(no):
    if n > 0:
        yes[i] = 0

pos = yes.index(max(yes))

print(pos)