Alignment override regex help, two sets of files with similiar names

[mike-tablo]

I know there have been similar posts, but I couldn't find one which exactly described my issue.

I'm trying to setup an alignment override in BC3.

I'm new to regex, am trying to compare two sets of files, where the only difference is the first three digits

Example:

abc_defg_filename1 xyz_defg_filename1
abc_defg_filename2 xyz_defg_filename2
abc_defg_filename3 xyz_defg_filename3
abc_defg_filename4 xyz_defg_filename4
abc_defg_filename5 xyz_defg_filename5

Any advice much appreciated

Thanks

[Aaron]

This pattern could match with a simpiler DOS mask (not RegEx) with:
abc_* = xyz_*

Or a RegEx like:
abc_(.*) = xyz_$1

[mike-tablo]

That's great, both work well, thanks :-)