title: Linux script sort and group without separator
body: <p>Input is given as :</p>
  
  <pre><code>10001123
  20001234
  30002111
  40003111
  50004000
  </code></pre>
  
  <p>Requirement:<br>
  Sort character from 2 to 5<br>
  Group by character from 2 to 5<br>
  Sum character 6 to 8<br>
  Only display line with character 6 to 8 > 0</p>
  
  <p>Expected output is given as :</p>
  
  <pre><code>10001357
  30002111
  40003111
  </code></pre>