#! /usr/bin/etc python
# coding: utf-8

def parse(l):
    i = l.split(" ")
    num = map(int, i[0:4])
    yn = i[4]
    return (num, yn)

def init(val):
    return [val] * 10

def inv(l):
    for i in xrange(len(l)):
        l[i] = (not l[i])
    return l

def liand(l1, l2):
    for i in xrange(len(l1)):
        l1[i] = l1[i] and l2[i]
    return l1

a = []
res = init(True)

n = int(raw_input(""))
for j in xrange(n):
    num, yn = parse(raw_input(""))
    a = init(False)
    for i in xrange(len(num)):
        a[num[i]] = True
    if yn == "NO":
        l = inv(a)
    res = liand(res, a)

for i in xrange(len(res)):
    if res[i]:
        print i