title: Find those files with an underscore that have no matching file without underscore in shell?
body: <p>I have got files like <code>klein_parat-strong-aqua-stop.jpg</code>. Most of them have a counterpart with all underscores replaced with a minus, <code>klein-parat-strong-aqua-stop.jpg</code> for example.</p>
  
  <p>Some of them however do not have that counterpart. I want to find those files in a folder including its subfolders. How would I do that?</p>
  
  <p>THanks!</p>