Change the Y to ier

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Across
  1. 2. healthy
  2. 4. easy
  3. 7. cosy
  4. 10. tasty
  5. 11. lucky
Down
  1. 1. heavy
  2. 3. busy
  3. 5. spicy
  4. 6. friendly
  5. 8. silly
  6. 9. messy