N = int(raw_input())
num = [True] * 10
for _ in xrange(N):
    turn = raw_input().split()
    yes = turn[4] == "YES"
    check = [not yes] * 10

    for i in xrange(4):
        check[int(turn[i])] = yes

    for i, v in enumerate(num):
        num[i] &= check[i]

for i, v in enumerate(num):
    if v:
        print i