What is the port city on Baltic Sea?

- Saint Petersburg, Russia

- Stockholm, Sweden

- Helsinki, Finland

- Tallinn, Estonia

- Riga, Latvia

- Klaipėda, Lithuania

- Gdynia, Poland

- Szczecin, Poland

- Rostock, Germany

- Lübeck, Germany

- Kiel, Germany

- Copenhagen, Denmark

- Malmö, Sweden

- Gothenburg, Sweden

- Karlskrona, Sweden