title: Vimeo Regex pattern
body: <p>can someone help me extract the following pattern in a Vimeo thumbnail URL:</p>
  
  <p>"406/278/406278075" from:</p>
  
  <p>"<a href="http://b.vimeocdn.com/ts/406/278/406278075_640.jpg" rel="nofollow">http://b.vimeocdn.com/ts/406/278/406278075_640.jpg</a>"</p>
  
  <p>I have tried creating my own regex for this but I can't get it.</p>
  
  <p>Thanks for your help.</p>