8 3 1 2

2

1 2 2

2 3 2

2 1

2

1 1

1 2

1 1

1 1 2

1

1 2

1

1

1 1

1

2 1 1

1 2 1 1

12

1

1 1

1 1 1

2

1 2 1 1

1 2 1

1 2 1

1 2 1

1 2 1

1 2 1