50

1 1 

2 2 

3 3 

4 4 

5 5. 

6 6 

7 7. 

8 8 

9 9. 

10 10 

11 11 

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13 13 

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23 23 

24 24 

25 25 

26 26 

27 27 

28 28 

29 29 

30 30 (có thể bỏ qua) 

31 31 

32 32 

33 33 

34 34 

35 35 

36 36 

37 37 

38 38 

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50 50 

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61 61 

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63 63 

64 64 

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66 66 