title: Reverse multiple SED commands
body: <p>I got a Hexadecimal string
  but this string has been modified by 6 SED commands.</p>
  
  <p>I wonder if there is a simple way to revert these commands</p>
  
  <p>I tried to reverse substitution by simply executing the sed command upside down</p>
  
  <p>thanks a lot for the help</p>