3. some
4. a
5. some
6. some
7. an
8. a
9. some
10. an
11. a, some
12. some
13. some
14. some
15. a, a
16. some
17. a
18. some
19. a
20. some
21. an
22. some
23. some, some
24. a, some
25. a
26. a
27. some, some
28. some
29. a
30. some, an
31. some
32. an
33. some
34. an
35. an, a, some
36. some
37. some
38. some
39. a
40. a
41. some
42. a
43. some
44. an
45. some
46. some
47. a
48. some, some
49. an
50. some
Объяснение:
