Duplicate number : 1,2,5,6,7,8,10,11,12,15,18,22,23,24,25,26,27,28,32

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33