n = int(input())

#次郎君が想像した数 -> 1
number = [0 for i in range(10)]

for _ in [0] * n:
    inp = input().split()
    num = map(int, inp[:-1])
    ans = inp[-1]
    if ans == "YES":
        for nu in num:
            if number[nu] >= 0:
                number[nu] += 1
    else:
        for nu in num:
            number[nu] = -1

if 1 not in number:
    number[number.index(0)] = 1
print(number.index(max(number)))