n = int(input())
num = [0]*10
for i in range(n):
    s = list(map(str, input().split()))
    if s[4]=='YES':
        for j in range(4):
            num[int(s[j])] += 1
    elif s[4]=='NO':
        for j in range(4):
            num[int(s[j])] -= 1
print(num.index(max(num)))