Number revision

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Across
  1. 5. eighty three
  2. 7. five
  3. 8. thirty seven
  4. 11. twelve
  5. 13. thirty three
  6. 15. fifty
  7. 17. twenty seven
  8. 20. forty
  9. 21. forty nine
Down
  1. 1. seventy six
  2. 2. three
  3. 3. thirty
  4. 4. eleven
  5. 6. forty eight
  6. 9. one
  7. 10. fifty one
  8. 11. nineteen
  9. 12. seventeen
  10. 14. fifteen
  11. 16. nine
  12. 18. zero
  13. 19. ninety eight