title: Can you look at these regex expressions and explain their output
body: <p>Can you look at the expression and the output pair below and tell me how it differs?</p>
  <p>1.</p>
  <pre><code>numregex=re.compile(r'\d{3}')
  numregex.findall('the num is 123431532524542524')
  
  output&gt;&gt;['123', '431', '532', '524', '542', '524']
  </code></pre>
  <ol start="2">
  <li></li>
  </ol>
  <pre><code>numregex=re.compile(r'(\d){3}')
  numregex.findall('the num is 1232143892432')
  
  output&gt;&gt;['3', '4', '9', '3']
  </code></pre>
  <ol start="3">
  <li></li>
  </ol>
  <pre><code>numregex=re.compile(r'(\d\d){3}')
  numregex.findall('the num is 123431532524542524')
  
  output&gt;&gt;['31', '24', '24']
  </code></pre>