public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        HashMap<Integer, String> map = new HashMap<>();

       while (true){

            String shell = reader.readLine();
            if (shell.isEmpty()){
                break;
            }
           int id = Integer.parseInt(shell);
           String name = reader.readLine();
           map.put(id,name);
           if (name.isEmpty()){
                break;
            }
       }

        for (HashMap.Entry<Integer, String> pair : map.entrySet()) {
            int key = pair.getKey();
            String value = pair.getValue();
            System.out.println(key + " " + value);
        }
    }