public static void processLine(String line) {
        StringTokenizer tk = new StringTokenizer(line);
        String t0 = tk.nextToken();
        String t1 = tk.nextToken();
        String t2 = tk.nextToken();

        if(t0.equals("friends")) {
            Person p1 = getOrCreatePerson(t1);
            Person p2 = getOrCreatePerson(t2);
            p1.addFriend(p2);
            p2.addFriend(p1);
        } else {
            getOrCreatePerson(t0).addHate(getOrCreatePerson(t2));
        }
    }