public class Solution { public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); HashMap<String,Integer> map=new HashMap<>(); String name=null; while(true) { name = reader.readLine(); if(name == null || name.isEmpty())break; for (Map.Entry<String, Integer> pair : map.entrySet()) { if(name.equals(pair.getKey())) { name = null; break; } } if(name == null || name.isEmpty())break; int id = Integer.parseInt(reader.readLine()); map.put(name,id); } for (Map.Entry<String, Integer> pair : map.entrySet()) { String key=pair.getKey(); Integer value=pair.getValue(); System.out.println(value + " "+ key); } } }