How to detect in regular expression without negative lookahead?

Question

JavaScript

It is necessary to detect the license plates of all cars that were illegally
parked on the company's private property, except for the license plate number
of the general director's car, K333OT777.

Letters used in license plates:
A, B, E, K, M, N, O, R, C, T, Y, X (Upper case)
Digits used in license plates:
000 to 999
Regions of license plates to be detected :
77, 97, 99, 177, 197, 199, 777, 799

I started writing and it only got to this point.
([AVEKMNORSTUCH])(3([0-24-9]\d?|3[0-24-9]?)?|[0-24-9]\d{2})([AVEKMNORSTUCH]{2 })(7([0-689]\d?|7[0-689]?)?|9([0-9]\d?|9[0-8]?)?\d{1,2 })