title: How to convert frozenset to normal sets or list?
body: <p>For example, I have a frozen set</p>
  
  <pre><code>[frozenset({'a', 'c,'}), frozenset({'h,', 'a,'})]
  </code></pre>
  
  <p>I want to convert it to a normal list like</p>
  
  <pre><code>[['a', 'c,'],['a,', 'd,']...]
  </code></pre>
  
  <p>What method should I use?</p>