title: How to put a blank space in a list?
body: <p>Example, I want to create this list:</p>
  
  <pre><code>a = [1, 2, 3, , 5]
  </code></pre>
  
  <p>How do I put in the blank space in between <code>3</code> and <code>5</code>? I want to make a game of Hangman with it, and the blank space will be filled in by the player. The list itself will contain the Hangman question that the player will need to solve.</p>