title: compare user's input in a python list
body: <p>The question is related to Python</p>
  
  <p>I have this list:</p>
  
  <pre><code>a=[1,1,2,3,5,8,13,21,34,55,89]
  
  # I ask the user to enter a  number
  
  user_number = input("Enter a number")
  </code></pre>
  
  <p>What I need is to display the numbers of the list that are smaller than than user_input</p>
  
  <p>Any hint please?</p>