3

3

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

1

5

5

9

9

15

15

12

12

5

5

9

9

1

1

1

1

2

2

20

20

13

13

7

7

30

30

35

35

29

29

9

9

17

17

1

1

1

1

11

11

12

12

11

11

17

17

1

1

0

0

60

60

20

20

4

4

25

25

13

13

12

12

9

9

24

24

40

40

15

15

25

25

25

25

7

7

23

23

10

10

28

28

20

20

20

20

31

31

20

20

8

8

15

15

17

17

27

27

9

9