#!/usr/bin/python3

import sys
import re

sciezki = {};
stanyakceptujace = [];
f = open(sys.argv[1], "r");
lines = f.readlines();
for line in lines:
	answer = re.match('^([0-9]+) ([0-9]+) ([a-z]*)$', line);
	if answer:
		try:
			sciezki[answer.group(1)][answer.group(3)] = answer.group(2);
		except KeyError:
			sciezki.update({answer.group(1):{}})
			sciezki[answer.group(1)][answer.group(3)] = answer.group(2);
	else:
		stanyakceptujace.append(int(line[:-1]));
for input in sys.stdin.readlines():
	act = 0;
	for char in input[:-1]:
		act = int(sciezki[str(act)][char])
	if act in stanyakceptujace:
		print("YES")
	else:
		print("NO")