Europe countries and their capital cities

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Across
  1. 3. The capital of the biggest empire in the world
  2. 4. one of the smallest countries in Europe
  3. 6. Czechoslovakia's left-side capital
  4. 7. Its capital sounds a lot like burn
  5. 9. Known for vodka
  6. 10. A Scandinavian country
Down
  1. 1. Capital of Greece
  2. 2. one of the most atrocious war crimes were committed there by the Nazis
  3. 5. this country is responsible for a lot of the World Wars
  4. 8. Famous for pizza