"or" in shell glob

Use ls *s1r* *s2r* *s3r* *s19r*.

If you care about non existing files you can set the nullglob option:

          nullglob
                  If  set,  bash allows patterns which match no files (see
                  Pathname Expansion above) to expand to  a  null  string,
                  rather than themselves.

If your shell is not bash, there is probably a similar way. Have a look at it's man page.