title: sorting a list of lists from shortest to longest
body: <p>i have to order a list of lists of numbers from shortest to longest. At equality of lenght, in ascending order.</p>
  
  <pre><code>input=[[19, -3, 2, -10, -20], [22, 2, -10, -20], [19, -3, 12, -20], [19, -3, 2, 10], [20, -10, -20], [22, 12, -20], [22, 2, 10], [30, -20], [20, 10], [50], [10], [10, -20], [22, 32], [30], [19, -3, 32]]
  </code></pre>
  
  <p>expected output: </p>
  
  <pre><code>[(10,), (30,), (50,), 
      (10, -20), (20, 10), (22, 32), (30, -20), 
      (19, -3, 32), (20, -10, -20), (22, 2, 10), (22, 12, -20), 
      (19, -3, 2, 10), (19, -3, 12, -20), (22, 2, -10, -20), 
      (19, -3, 2, -10, -20)]
  </code></pre>