title: Regex 2 digits separated by commas, not all required
body: <p>I need a regex for the following input:</p>
  
  <blockquote>
    <p>[2 digits], comma, [two digits], comma, [two digits]</p>
  </blockquote>
  
  <p>The 2 digits cannot start with 0. It is allowed to only enter the first 2 digits. Or to enter the first 2 digits, then a comma en then the next 2 digits. Or to enter the full string as described above.</p>
  
  <p>Valid input would be:</p>
  
  <blockquote>
    <p>10<br>
    99<br>
    17,56<br>
    15,99<br>
    10,57,61<br>
    32,44,99  </p>
  </blockquote>
  
  <p>Could anyone please help me with this regex?</p>
  
  <p>At the moment I have this regex, but it doesn't limit the input to maximum 3 groups of 2 digits:</p>
  
  <pre><code>^\d{2}(?:[,]\d{2})*$
  </code></pre>