1. Aare   Rome   London   New York   Bern   Hint Half-n-half Clue   2. Tiber Tiber Tevere   Lisbon   Montreal   Rome   Belgrade   Half-n-half Clue   3. Tagus Tagus Tejo   Lisbon   New York   Paris   Bern   Half-n-half Clue   4. Danube   Nanking   New York   Vienna   Berlin   Half-n-half Clue   5. Spree   New York   Berlin   Kinshasa   Montreal   Half-n-half Clue   6. Hudson   New York   Nanking   Kinshasa   Washington D.C.   Half-n-half Clue   7. Yangtze Kiang Yangtse Kiang Yangtze Yangtse Chang Jiang   Cairo   Nanking   Lisbon   Berlin   Half-n-half Clue