from collections import *
from itertools import *
from functools import *
from heapq import *
import sys,math
# input = sys.stdin.readline

N = int(input())
ans = set([str(i) for i in range(10)])
for _ in range(N):
    X = list(input().split())
    s = set(X[:-1])
    if X[-1]=='YES':
        ans &= s
    else:
        ans -= s
print(*ans)