title: Regular expression string followed by numbers
body: <p>I am writing a regular expression to extract phrases like <code>#Question1#</code> or <code>#Question125#</code> from html string like </p>
  
  <blockquote>
    <p>Patitent name #Question1#, Patient was suffering from #Question2#, Patient's gender is #Question3#, patient has #Question4# drinking for the last month. His DOB is #Question5#</p>
  </blockquote>
  
  <p>The first half of the expression is simple just <code>#Question</code>, but I also need to match for a series of digits with unspecified length, and the whole string ends with #.</p>
  
  <p>Once I find the matching phrase, how I extract only the digits from the string? Like for example, #Question312#, I just want to get 312 out?</p>
  
  <p>Any suggestion?</p>