title: My append command doesn't work python
body: <p>Here is my code:</p>
  
  <pre><code>letters = ['a','b','c']
  print("here are the letters you already searched",letters)
  letter = input("please enter a letter")
  print(letter)
  letters = letters.append(letter)
  </code></pre>
  
  <p>It won't append it to the list. I also tried this:</p>
  
  <pre><code>letters = ['a','b','c']
  print("here are the letters you already searched",letters)
  letter = input("please enter a letter")
  print(letter)
  letters.append(letter)
  </code></pre>