title: Split string at last (or fourth) occurence of "." delimiter
body: <p>I like to delimit the string as follow</p>
  
  <p>Given the following String :</p>
  
  <pre><code>Column 1    
  10.80.111.199.1345
  127.0.0.1.3279
  </code></pre>
  
  <p>I will like to delimit numbers after the last ".", which will get the follow output</p>
  
  <pre><code> Column 1       Column 2               
  
  10.1.12.5       1345
  127.0.0.1       3279
  </code></pre>
  
  <p>I know excel has the delimitor function which allows me to delimit with specific symbol or through the fixed width. It does not seems to work for fixed width.</p>
  
  <p>Is there any alternatives, rather than delimited with "." can concating back the strings on Column 1?</p>