Bosnia & Herzegovina
Russia: The Western side of Russia (also known as European Russia) is part of Europe, while the Eastern side ( also known as Siberia) is part of Asia. I've put Russia under both Asia and Europe. The dividing line between Europe and Asia, in Russia , is the Ural Mountains.
Turkey: The Eastern side of Turkey (also known as Thrace) is part of Europe, while the Western side (also known as Anatolia) is part of Asia.
I've put Turkey under both Asia and Europe. The diving line between Europe and Asia, in Turkey, is the strait (a narrow passage of water) Bosphorus.