St. Petersburg: Andrei, 18, and Katya, 20, had just finished taking their final exams at a St. Petersburg music university and were headed for a walk. Katya said she grew up on Sakhalin and moved to St. Petersburg to study. She now lives with Andrei. ''We hit it off pretty quickly,'' Andrei joked. Andrei is studying singing, while Katya is studying to be a conductor. Andrei said he has been playing the bayan, or Russian accordion, since age 9. He said his parents didn't encourage him to study it. Rather, he saw a friend playing it and decided for himself to sign up for classes.