N = int(input())
res = [1 for _ in range(10)]

for _ in range(N):
    *a, r = input().split()
    a = list(map(int, a))
    d = [0 for _ in range(10)]
    for i in range(4):
        d[a[i]] = 1
    if r == 'YES':
        for i in range(10):
            if not d[i]:
                res[i] = 0
    else:
        for i in range(10):
            if d[i]:
                res[i] = 0

for i in range(10):
    if res[i]:
        print(i)