Угадай число

# E

n = int(input())
res = set(range(1, n + 1))
while 1:
    arr = input()
    if arr == 'HELP':
        break
    else:
        pr = set(map(int, arr.split()))
        arr = input()
        if arr == 'YES':
            res &= pr
        else:
            res -= pr
print(*sorted(res))