Test, validate and match regular expressions
This regex matches Romanian license plates following the standard format: county code, number, and three letters. The first part matches Romanian county codes (judet) such as B for Bucharest, AB for Alba, or AG for Argeș. The middle section captures numbers from 01 to 999, and the final part matches exactly three alphabetic characters (case insensitive). It's commonly used for vehicle registration validation or data extraction in Romanian systems.