This is the 775th most frequent Lithuanian word.
koncertų
The Lithuanian word "koncertų" means "concerts" (genitive plural form).
Here 'koncertų' specifies tickets associated with concerts, implying tickets that are from various concerts.
Man patinka rinkti koncertų bilietus.
I like to collect concert tickets.
In this case, 'koncertų' describes the program as being related to concerts, showing a genitive case relationship to its context.
Jis dažnai rašo apžvalgas apie koncertų programą.
He often writes reviews about the concert program.
The word 'koncertų' is used as a possessive form, indicating ownership of the halls by concerts, hence 'concert halls'.