title: xsl remove all non-numeric characters and leading 1
body: <p>I need to convert incoming phone number strings to a standardized format that does not have any non-numeric characters and strips off the leading number if it is 1.</p>
  
  <p>For example:</p>
  
  <p>"+1 (222) 333-4444 x 5555" becomes "22233344445555"</p>
  
  <p>Thanks in advance for your help!</p>