title: regex except string
body: <p>Now are hours that I try to create a regex but without result.
  I need a regex that returns true if it corresponds to this rule:   https?://example.it.* but returns false  ONLY IF corresponds to this specific URL <a href="https://example.it/hello" rel="nofollow">https://example.it/hello</a></p>
  
  <p>Is possible??? </p>
  
  <p>Thank you</p>