1

1

1

1

1

1

1

�

�

�

�

�

�

�

�

�

�

9

9

9

9

9

9

9

9

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

2

�