Can two rivers cross?

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  1. #different
  2. #nielba
  3. #paint
  4. #colors
  5. #other
  6. #water
  7. #colored
  8. #without
  9. #waters
  10. #mixed
  11. #cross
  12. #mixing
  13. #having
  14. #continue
  15. #researchers
  16. #rivers
  17. #their
  18. #separate