title: Sum lists with different lengths
body: <p>What's the best way to sum two or more lists even if they have different lengths?</p>
  
  <p>For example I have:</p>
  
  <pre><code>lists = [[1, 2], [0, 3, 4], [5]]
  </code></pre>
  
  <p>and the result should be:</p>
  
  <pre><code>result = [6, 5, 4]
  </code></pre>