title: KSH Shell script Matching file pattern
body: <p>I am new to shell script. I want to iterate a directory for the below specific pattern.</p>
  
  <pre><code>Ad_sf_03041500000.dat
  SF_AD_0304150.DEL
  SF_AD_0404141.EXP
  </code></pre>
  
  <p>Number of digits should be exactly match with this pattern.
  I am using KSH shell script. Could you please help me to iterate only those files in for loop. </p>