title: Regex matching digit and letters or only digits
body: <p>I'm stuck trying to code a regex which match with those conditions:</p>
  <ul>
  <li>string with more than 9 digits</li>
  <li>string with more than 9 digits and letters</li>
  </ul>
  <p>I can't figure out how to write my regex saying to it: digit or digit and letters can match but not letters.</p>
  <p><strong>Those string should match:</strong></p>
  <ul>
  <li><em>12345678987654567</em></li>
  <li><em>jhsjd4567hsqdgqsgh456786576567kj</em></li>
  <li><em>9l8j9n9k0n9n8n</em></li>
  </ul>
  <p><strong>Those string should not match:</strong></p>
  <ul>
  <li><em>loremipsum</em></li>
  <li><em>a1</em></li>
  <li><em>12567</em></li>
  </ul>
  <p>My regex so far: <code>/(?:\w){9,}/</code></p>
  <p>Thanks a lot :)</p>