text

text

book

book

100

100

200

200

500

500

1000

1000

5000

5000

2000

2000

1

1

3

3

5

5

7

7

9

9

11

11

13

13

15

15

17

17

19

19

21

21

22

22

23

23

24

24

25

25

26

26

27

27

28

28

29

29

30

30

31

31

32

32

33

33

34

34

35

35

36

36

37

37

2

2

6

6

10

10

14

14

18

18

4

4

8

8

12

12

16

16

20

20

etc

etc