{1,3}matches between 1 and 3 characters from the set below:
A-Zone character from A (6510) to Z (9010) (case sensitive)
Öthe literal Ö (21410 / 3268 / D616) (case sensitive)
Üthe literal Ü (22010 / 3348 / DC16) (case sensitive)
Äthe literal Ä (19610 / 3048 / C416) (case sensitive)