title: Adding text to a third column of a csv file
body: <p>I have a data file I need to add text to the 3rd column using sed. My current data looks like this:</p>
  <pre><code>0001   2345    103 Jane   Doe
  0002   4567    103 Jane   Doe
  0003   4578    105 John   Doe
  0004   5678    103 Jane   Doe
  </code></pre>
  <p>I need it to look like:</p>
  <pre><code>0001   2345    103061321 Jane   Doe
  0002   4567    103061321 Jane   Doe
  0003   4578    105061321 John   Doe
  0004   5678    103061321 Jane   Doe
  </code></pre>
  <p>How Can I do this using SED?</p>