Markitup: List within a list

Hi all,

Does anyone know if it's possible to create an unordered list within and unordered list using the markitup editor?

I need to end up with the output below:

<ul>
  <li>ABC</li>
  <li>
    <ul>
      <li>123</li>
    </ul>
  </li>
</ul

Any ideas?

cheers,

Alex