title: concatenate string between parenthesis in a file
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/11695238/how-can-i-delete-columns-beginning-and-ending-with-parenthesis-in-a-file">how can i delete columns beginning and ending with parenthesis in a file</a>  </p>
  </blockquote>
  
  
  
  <p>How can I concatenate string between parenthesis in a file?<br>
  <strong>Expectd Input - content of input.txt</strong><br>        </p>
  
  <pre><code>ABC EFG    
  BCD (AB CD) EFG
  DEF BCD AB(ABC)  
  </code></pre>
  
  <p><strong>Expectd Output -- content of output.txt</strong><br>    </p>
  
  <pre><code>ABC EFG    
  BCD (ABCD) EFG    
  DEF BCD AB(ABC)
  </code></pre>