title: What is the shortest notation for this regex?
body: <p>We've determined that this regex works for validating a certain field, but would like it to be shorter since it will be repeated numerous times:</p>
  
  <pre><code>\D\D\d\d\d\D\d\d\D-\d\d\d 
  </code></pre>
  
  <p><strong>What is the shortest notation that would still validate the same as the above regex?</strong></p>