title: Regex for parsing gift card codes
body: <p>I'm looking to parse gift card codes from a few files. This is an example code:</p>
  
  <pre><code>AQ9N-VLL9A3-23FF
  </code></pre>
  
  <p>Basically all alphanumeric characters, in sets of 4, then 6, then 4 again.</p>
  
  <p>Can I come up with a regex expression for parsing this?</p>