Registrations input validation student number auto capitalize

One-sentence description

Automatically convert student numbers to correct capitalization

Why?

Especially on mobile devices, when entering a student number in the registration form, it starts with an capital S while only a small letter s is accepted (or the other way around, sorry I don't know). It would be nice to just accept both and convert it automatically. Same for people just entering a 7-digit number without prefix s.

Current implementation

Only certain capitalization is accepted.

Suggested implementation

Accept all CaPiTaliZatIoN and convert it automatically to a specific format.