Congratulations! Now you know all the seven Lithuanian cases and their singular and plural endings!

Do you remember that you must change the endings of nouns when you address them?

Tai Laimis. This is Laimis.
Labas, Laimi! Hi, Laimis!

This is called the vocative case. In plural, however, its endings stay the same:

Lietuvoje gyvena lietuviai. In Lithuania live Lithuanians.
Lietuviai, kur esate? Lithuanians, where are you?

Eina vyrai. Men are going.
Kur einate, vyrai? Where are you going, men?