2

2

3

2

0

0

-1

0

0

-1

0

1

4

0

0

4

0

1

-1

0

0

-1

0

1

8

2

2

4

0

0

8

0

1

2

1

1

0

0

0

6

0

1

7

0

2

2

0

0

6

1

4

2

0

1

4

0

0

5

2

2