title: Get numbers from string
body: <p>I got a string:</p>
  
  <pre><code>"1|2 3 4 oh 5 oh oh|e eewrewr|7|".
  </code></pre>
  
  <p>I want to get the digits between first pipes (|), returning "2 3 4 5".</p>
  
  <p>Can anyone help me with the regular expression to do that?</p>