We don't know in what way it's not working. ...well, I can see one way. But I need to hear from you what messages you're getting (if any), or what "would not work" means. Example input and the output it produces, along with the output you desire, are all important information so that we don't have to guess at your needs, or at what's wrong.

Please follow up in this thread with example input, expected output, and exactly what you're seeing instead. Then we can explain why you are seeing what you are seeing, and what needs to change so that you can see what you want.