title: Match only words (sometimes with dots seperating) regex
body: <p>I have a list like so:</p>
  <pre><code>example.com=120.0.0.0
  ben.example.com=120.0.0.0
  +ben.example=120.0.0.0
  +ben.example.com.np=120.0.0.0
  ben=120.0.0.0
  ben-example.com=120.0.0.0
  ben43.example.com=120.0.0.0
  </code></pre>
  <p>I need to find only the words (with dots seperated).
  No ips, <code>=, +</code> and so on.
  Some FQDN have multiple dots, some none at all and so on.</p>
  <p>Is this possible?</p>
  <p>If the script works well when i run the regex i want to get these only:</p>
  <pre><code>ben.example.com.np
  ben.example
  ben.example.com
  example.com
  ben
  ben43.example.com
  </code></pre>
  <p>I want to parse the file into ips and FQDNS via python regex so i can work with it and check if the ips are available for the domain.</p>