n = int(input())
count = [1] * 10


for _ in range(n):
    input_list = input().split()
    abcd_list = list(map(int, input_list[:4]))
    if input_list[4] == 'YES':
        for i in abcd_list:
            count[i] *= 2
    else:
        for i in abcd_list:
            count[i] = 0

tmp_index = 0
tmp_v = 0
for i, v in enumerate(count):
    if tmp_v < v:
        tmp_v = v
        tmp_index = i

print(tmp_index)