1

1

2

2

3

3

0

0

1

1

0

0

1

1

5

5

0

0

0

0

10

10

20

20

0

0

5

5

4

4

3

3

6

6

1

1

8

8

4

4

4

4

3

3

0

0

2

2

3

3

2

2

0

0

4

4

1

1

1

1

3

3

10

10

10

10

4

4

19

19

15

15

20

20

15

15

21

21

12

12

19

19

3

3

0

0

4

4

0

0

4

4

13

13

2

2

2

2

14

14

10

10

19

19

7

7

14

14

21

21

26

26

12

12

10

10

10

10

5

5