title: How to sort in vim starting from some column/character
body: <p>How to sort following text starting from column 5:</p>
  
  <pre><code>123456789
  000 123
  013 122 
  122 013
  123 000 
  </code></pre>
  
  <p>I want to get this:</p>
  
  <pre><code>123 000 
  122 013
  013 122 
  000 123
  123456789
  </code></pre>