title: printing a column after a specific pattern from a text file
body: <p>I have these lines of data. I want to just print the numbers that follows A, C and D. Is there a way to print those columns?</p>
  
  <pre><code> (((A 0.0400213  B 0.0400213  0.00737467  C 0.047396  0.03466  D 0.082056 ;
   ((C 0.0275027  (A 0.023266  B 0.023266  0.00423667  0.0131187  D 0.0406213 ;
   ((C 0.0310553  (B 0.0210907  A 0.0210907  0.00996467  0.0222647  D 0.05332 ;
   ((C 0.03491  (A 0.020474  B 0.020474  0.014436  0.0221067  D 0.0570167 ;
   ((C 0.0485573  (A 0.00938133  B 0.00938133  0.039176  0.00335133  D 0.0519087 ;
  </code></pre>
  
  <p>If I want to get the numbers following A<br>
  My expected out come will be : <br></p>
  
  <pre>
  0.0400213,
  0.023266,
  0.0210907,
  0.020474,
  0.00938133
  </pre>