**Sample Input:**
    $PMSuccessEmailUser=abc@gmail.com
    $PMFailureEmailUser=abc@gmail.com,def@gmail.com
       $NofileEmailUser=abc@gmail.com
       $EmailUser=abc@gmail.com
    $NoreportUser=abc@gmail.com
    **Sample output:**
    $PMSuccessEmailUser=mnb@gmail.com
    $PMFailureEmailUser=mnb@gmail.com
       $NofileEmailUser=mnb@gmail.com
       $EmailUser=mnb@gmail.com
    $NoreportUser=mnb@gmail.com