title: Grab the second number and the word after it using regexp
body: <p>I have a string:</p>
  <pre><code>str = &quot;1 - hello world 1234 abc 5678 def&quot;
  </code></pre>
  <p>I want to grab <code>1234 abc</code> from the string.</p>
  <p>My current implementation <code>str[/\d+\s*\D*$/]</code> only grabs the last number with the word.</p>