title: Printing our every third letter in Python for Grok
body: <p>So, I'm using Grok learning and I'm stuck on the task "Secret Agent". I have figured out most the code except I have a random space at the end which I can't remove. I have used <code>.rstrip()</code> and I'm really confused. Here is my code so far:</p>
  
  <pre><code>text = input("Message? ")
  length = len(text)
  for i in range (0, length, 3):
    decoded = text[i]
    print(decoded, end=' '[1:3])  
  </code></pre>