title: Match a word followed by any digit with exception
body: <p>Concretly, I must match the word <code>cat</code> followed by any digit(s), but not match if the digits is <code>12</code>.</p>
  <pre><code>cat3   YES
  cat12  NO
  cat43  YES
  cat18  YES
  rel97  NO
  cat12  NO
  cat    NO
  cat36  YES
  cat14  YES
  cat12  NO
  cat123 YES
  </code></pre>
  <p>The 'best' regex I can build for now is <code>cat\d+</code>, which match all I want but also match <code>cat12</code>, matches that I want to exclude.</p>
  <p><a href="https://regex101.com/r/lNY38M/1" rel="nofollow noreferrer">https://regex101.com/r/lNY38M/1</a></p>
  <p>Is it possible to express an exception when using regex matching?</p>