title: shellscript get column data
body: <p>I have a file that's the result of the comm command, it has 2 columns, I wish to separate these 2 columns into two different files, how do I do that?
  <br/>
  the file looks like:</p>
  
  <pre>
  a
  b
           g
           f
  c
  d
  
  </pre>