In my XML file there are lots of sub strings starting with STDSUP- and then three digits. For example: STDSUP-123. I would like to replace the STDSUP with CCDA. There are some sub strings where STUSUP- is following by non-numeric characters. I don't want to change them. So, I used STDSUP-\d\d\d in the find field and CCDA-\d\d\d in the replace with field. But the three digits are getting replaces with ddd. I want to replace only STDSUP and want the digits unchanged.