title: How to list files with small char file names?
body: <p>A folder has these files: 1ABC.txt, 1abc.txt ....
  How to do ls to list abc.txt and other small char filename only ?</p>
  
  <pre><code>ls 1a*.txt
  </code></pre>
  
  <p>...works, but this doesn't:</p>
  
  <pre><code>ls 1[a-z]*.txt
  </code></pre>