For the writer, there are 20
1. 1 + 39 = 40
2. 2 + 38 = 40
3. 3 + 37 = 40
4. 4 + 36 = 40
5. 5 + 35 = 40
6. 6 + 34 = 40
7. 7 + 33 = 40
8. 8 + 32 = 40
9. 9 + 31 = 40
10. 10 + 30 = 40
11. 11 + 29 = 40
12. 12 + 28 = 40
13. 13 + 27 = 40
14. 14 + 26 = 40
15. 15 + 25 = 40
16. 16 + 24 = 40
17. 17 + 23 = 40
18. 18 + 22 = 40
19. 19 + 21 = 40
20. 20 + 20 = 40