title: Three digits followed by dash after every two digits regex
body: <p>My target is to add three digits followed by a dash on every two digits regex. </p>
  
  <p>Example: Given</p>
  
  <blockquote>
    <p>01234342323</p>
  </blockquote>
  
  <p>I need to obtain</p>
  
  <blockquote>
    <p>012-34-34-23-23</p>
  </blockquote>
  
  <p>I am using this regex: <code>\B(?=(\d{3})+(?!\d))</code>, but it did not work as expected. What should I change on it to make it work?</p>