title: Simple Inverse Regex
body: <p>This one should be simple.</p>
  
  <p>I want to match any numbers that do NOT have a series of numbers in the front.</p>
  
  <p>I have the regex, but it does the exact opposite. I need an inverse of it.</p>
  
  <p>Examples:</p>
  
  <pre><code>123456 - NOT MATCH
  456789 - MATCH
  451236 - MATCH
  </code></pre>
  
  <p>Right now, it's the opposite of the above.</p>
  
  <p>The regex: <code>^(123)</code></p>