title: How to use awk/sed to reformat this text
body: <p>everyone. I have a text file like this:</p>
  
  <pre><code>1
  question1
  answer1
  2
  question2
  answer2
  3
  question3
  answer3
  &lt;etc&gt;
  </code></pre>
  
  <p>I've read (and unsuccessfully tried) many different ways using <code>awk</code>. I'm not a programmer, so <code>awk</code> is difficult to understand.</p>
  
  <p>There are so many of you who are experts in <code>awk</code>, so I'm hoping that you will show me the correct command to do this.</p>
  
  <p>Thank you for your help!</p>
  
  <p>I would like to eliminate the numbered lines (1st, 4th, 7th, etc.) then put a comma between the questions and answers so the resulting text file looks like:</p>
  
  <pre><code>question1, answer1
  question2, answer2
  question3, answer3
  &lt;etc&gt;
  </code></pre>