@Test
    public void testEasy5() throws Exception {
        String start = "hit";
        String end = "abc";
        String[] words = {"hot", "dot", "dog", "lot", "log", "hiz"};
        Set<String> dict = Utils.stringArrayToSet(words);

        WordLadderII wordLadderII = new WordLadderII();
        List<List<String>> result = wordLadderII.findLadders(start, end, dict);

        Utils.printListListString(result);
    }