title: Find strings that do not begin with something
body: <p>This has been gone over but I've not found anything that works consistently... or assist me in learning where I've gone awry.</p>
  
  <p>I have file names that start with 3 or more digits and <code>^\d{3}(.*)</code> works just fine. 
  I also have strings that start with the word 'account' and <code>^ACCOUNT(.*)</code> works just fine for these.</p>
  
  <p>The problem I have is all the other strings that DO NOT meet the two previous criteria. I have been using <code>^[^\d{3}][^ACCOUNT](.*)</code> but occasionally it fails to catch one.
  Any insights would be greatly appreciated.</p>