Compare an executable identity marker

Use the same owner-execute position in both example rows. Effective
identity is the identity used in many permission decisions. SUID can
change that identity on eligible execution, but metadata alone cannot
show unsafe program behavior or establish an exploitable flaw.

No program is supplied or executed.
Normal example: -rwxr-xr-x root root helper-normal
SUID example:   -rwsr-xr-x root root helper-special
Owner triplet is positions 2-4 after the file-type character.
lowercase s: set-user-ID bit plus owner execute bit in this listing.
uppercase S: set-user-ID without that owner execute bit.
Linux execution restrictions can suppress identity transitions.
Question regular executable mode: -rwsr-x--- analyst learners tool
Which owner-execute-position marker indicates SUID: s or x?