How to exclude some specific accounts code from cost accounting Mapping set

Hi Experts,

This is Oracle cloud version 13 Cost accounting mapping set issue. We have created mapping set for one GL account segment in cost accounting. Few account code needs to exclude from the mapping set, as these account has to be used for other purpose. Could you please suggest any idea how to exclude some specific accounts code from Mapping set? Any wildcard symbol through which we can do?

Appreciated for your time and help.

Thanks,

Nalini