title: SSN Regex for 123-45-6789 OR XXX-XX-XXXX
body: <p>Can someone provide me a regex for SSN that matches either</p>
  
  <p>123-45-6789</p>
  
  <p>OR</p>
  
  <p>XXX-XX-XXXX</p>
  
  <p>I currently have <code>^\d{3}-?\d{2}-?\d{4}$</code> which matches the first expression, but I need to add the second expression to it as an alternative.</p>
  
  <p>Thanks!</p>