1

1

1

1

1

1

1

1

1

1

1

2

1

1

1

1

1

1

2

1

1

1

1

1

1

3-4

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

7