1

1

2

2

0

0

1

1

1

1

2

2

4

4

0

0

2

2

1

1

0

0

5

5

2

2

0

0

4

4

1

1

8

8

8

8

6

6

4

4

7

7

4

4

6

6

7

7

2

2

8

8

1

1

6

6

1

1

15

15

0

0

1

1

2

2

0

0

0

0

0

0

1

1

0

0

0

0

4

4

1

1

1

1

0

0

0

0

0

0

3

3

1

1

1

1

4

4

0

0

1

1

0

0

0

0

0

0

0

0

0

0

2

2

0

0

0

0

1

1

0

0

0

0

0

0

0

0

1

1

0

0

3

3

0

0

0

0

0

0

2

2

13

13

4

4

8

8

3

3

1

1

9

9

8

8

4

4

20

20

1

1

2

2

2

2

0

0

0

0

1

1

0

0

0

0

1

1

7

7

3

3

0

0

0

0

3

3

4

4

1

1

1

1

2

2

1

1

3

3

1

1

1

1

1

1

3

3

6

6

2

2

1

1

0

0

2

2

3

3

0

0

1

1

1

1

0

0

2

2

4

4

0

0

1

1

1

1

0

0