не пропускает валидатор , помогите пожалуйста!

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 { HashMap <String,String> map = new HashMap<>(); BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); while (true) { String city = reader.readLine(); String family = reader.readLine(); if ((family.isEmpty())||(city.isEmpty())){ break; } map.put(city,family); } String city1 = reader.readLine(); Iterator<Map.Entry<String,String>> iterator = map.entrySet().iterator(); while(iterator.hasNext()){ Map.Entry<String,String> pair = iterator.next(); String c = pair.getKey(); String f = pair.getValue(); if (c.equals(city1)){ System.out.println(f); } } } }