title: Removing parts of a string that contain digit with SED/Perl
body: <p>I have a data that looks like this:</p>
  
  <pre><code>AB208804_1 446 576 AB208804_1orf 0
  AB208804_20 446 576 AB208804_20orf 0
  </code></pre>
  
  <p>I want to convert them into this:</p>
  
  <pre><code>AB208804 446 576 AB208804orf 0
  AB208804 446 576 AB208804orf 0
  </code></pre>
  
  <p>just by removing _\digit part in column 1 and 4. </p>
  
  <p>Why this line doesn't work:</p>
  
  <pre><code>sed 's/_\d+//g'
  </code></pre>
  
  <p>What's the correct way to do it (one-liner)?</p>