To find s.000 to s.999 you would use a regex like this:

/s\.\d{3,3}/

- Literal 's'
- Literal '.'
- Exactly 3 digits (0-9)
* Case sensitive

This would NOT match s.0 or S.000 . It will match s.183 s.724 s.025 etc. anywhere in the string.

-genius_at_work