title: Split string by last separator
body: <p>What I have is a giant text file that contains a bunch of strings that are split by <code>\</code>.  The problem for me is there can be 5 <code>\</code> or 4 <code>\</code> or 3 <code>\</code>.</p>
  
  <p>What I need to to pull the last <code>\</code> no matter how many of them there are. Any help is appreciated.</p>
  
  <p>Examples:</p>
  
  <pre>
  I\need\this
  I\want\line\this
  Hello\give\me\all\this
  </pre>
  
  <p>I need the word <code>this</code> for example, but obviously it's not just the word <code>this</code>.</p>