N = int(input())
ans = set(i for i in range(1, 10))
a, b, c, d, x = list(input().split())
a, b, c, d = map(int, [a, b, c, d])
if x == "YES":
    ans = {a, b, c, d}
else:
    ans -= {a, b, c, d}


for _ in range(N - 1):
    a, b, c, d, x = list(input().split())
    a, b, c, d = map(int, [a, b, c, d])
    if x == "YES":
        ans &= {a, b, c, d}
    else:
        ans -= {a, b, c, d}

print(*ans)