N = int(input())

dat = [True] * 10
for _ in range(N):
    A,B,C,D,R = input().split()
    A = int(A)
    B = int(B)
    C = int(C)
    D = int(D)
    if R == 'NO':
        dat[A] = False
        dat[B] = False
        dat[C] = False
        dat[D] = False
    else:
        for i in range(10):
            if i != A and i != B and i != C and i != D:
                dat[i] = False
for i in range(10):
    if dat[i]:print(i)