Ordinal numbers

12345678910
Across
  1. 2. 31st
  2. 6. 12th
  3. 8. 9th
  4. 9. 3rd
  5. 10. 6th
Down
  1. 1. 8th
  2. 3. 20th
  3. 4. 4th
  4. 5. 2nd
  5. 7. 5th