title: How do I Get the distinct List of Special Characters from a File using GREP or SED?
body: <p>I have a file which contains about 30000 Records delimited by '|'. I need to get a distinct list of special characters only from the file. </p>
  
  <p>For Eg: 
  123|fasdf|%df&amp;|pap,came|! 
  234|%^&amp;asdf|34|'":|</p>
  
  <p>My output should be: 
  |%&amp;,!^'":</p>
  
  <p>Any help would be greatly appreciated. 
  Thanks,
  Velraj.</p>