Ordinal numbers

Across

2. 5th
6. 23rd
8. 10th
9. 21st
12. 3rd
13. 22nd
15. 32nd
16. 6th
17. 40th
20. 11th
21. 31st

Down

1. 33rd
2. 52nd
3. 20th
4. 30th
5. 63rd
7. 2nd
9. 12th
10. 1st
11. 7th
14. 13th
18. 4th
19. 41st