Test, validate and match regular expressions
This regex matches Ukrainian university academic group identifiers. It captures specialty abbreviations (КІ for Computer Engineering, КН for Computer Science, ПІ for Applied Informatics, ЕкК for Economic Cybernetics), followed by a hyphen and a 5-digit group number. An optional suffix ' с. т.' is also supported. Useful for parsing or validating student group codes in academic systems.