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Across
  1. 3. it's the subject with all the numbers
  2. 4. they live in the water
  3. 6. a place with water and sand
  4. 8. it's what you do with your brain
  5. 9. it goes on pizza
Down
  1. 1. it's how you clean your hands
  2. 2. you might find one at the beach
  3. 5. they can live on a farm
  4. 7. you sit on it
  5. 8. your mouth is full of them