title: Compare two lists (one of them with another list) and return the index of the matches
body: <pre><code>a = ['french', 'english']
  
  b = ['(portuguese; french)', '(english)']
  </code></pre>
  
  <p>I want to compare two lists and in return I want the index of the matches</p>
  
  <p>I tried:</p>
  
  <pre><code>matches = list([i for i, item in enumerate(a) if item in b]+[i for i, item in enumerate(b) if item in a])
  </code></pre>
  
  <p>But the result was an empty list</p>