title: Regular expression for strip out numbers which does not have any alphabets in middle
body: <p>I want to strip out continues number string using regex from a text field minimum 9 digits long. It should not have any alphabets between the digits however space is allowed </p>
  
  <p>for example</p>
  
  <pre><code>ABCD 123456789 -&gt; 123456789
  123M4567 -&gt; blank
  1234567890 ABCD -&gt; 1234567890
  123 456 789 ABCD -&gt; 123456789 or 123 456 789 will also be fine
  </code></pre>