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]
    for i in range(10):
        if i in tmp:A[i]*=(rep!='NO')
        else:A[i]*=(rep=='NO')
print(*[x for x in A if A[x] ])