N=int(input())
A={x:1 for x in range(10)}
for _ in range(N):
    tmp=input().split()
    rep=tmp.pop()
    tmp=[int(x) for x in tmp]
    if rep=='NO':
        for x in tmp:A[x]=0
    else:
        for x in A:
            if x not in tmp:A[x]=0
print(*[x for x in A if A[x]])