package com.javarush.task.task08.task0829;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;

/*
Модернизация ПО
*/

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        Map<String, String> map = new HashMap<String, String>();

        while (true){
            String city = reader.readLine();
            String family = reader.readLine();
            if (city.isEmpty()||family.isEmpty()){
                break;
            }

            map.put(city, family);
        }

        String cityS = reader.readLine();

        Iterator<Map.Entry<String, String>> iterator = map.entrySet().iterator();


        while (iterator.hasNext())
        {
            Map.Entry<String, String> pair = iterator.next();
            String key = pair.getKey();
            String value = pair.getValue();
            if (key.equals(cityS)){
                System.out.println(value);
        }
    }
    }
}