2

0

1

0

2

0

1

0

1

0

0

1

4

0

1

2

7

0

3

1

1

0

0

1

6

0

3

0

8

0

4

0

0

0

0

0

10

0

5

0

4

0

2

0

2

0

1

0

2

0

1

0