title: RegEx pattern any two letters followed by six numbers
body: <p>Please assist with the proper RegEx matching any 2 letters followed by any combination of 6 whole numbers.</p>
  <pre><code>These would be valid: 
  RJ123456
  PY654321
  DD321234
  
  These would not
  DDD12345
  12DDD123
  </code></pre>