N = int(input())
num = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
cand = []
answer = []
bool = False

for i in range(N):
    A, B, C, D, R = map(str, input().split())
    if R == "NO":
        num[int(A)] = -1
        num[int(B)] = -1
        num[int(C)] = -1
        num[int(D)] = -1
    if R == "YES":
        bool = True
        if A in cand:
            answer.append(int(A))
        else:
            cand.append(A)
        if B in cand:
            answer.append(int(B))
        else:
            cand.append(B)
        if C in cand:
            answer.append(int(C))
        else:
            cand.append(C)
        if D in cand:
            answer.append(int(D))
        else:
            cand.append(D)

for i in range(10):
    if bool:
        if (num[i] != -1) and (i in answer):
            print(i)
    else:
        if num[i] != -1:
            print(i)