1 2 1

2

2 1

3 1

2 1

2 1

3 1

1 2

3 1

2 2

1 1

1

1 1

2 1

3

1 1

1 1

2

2

1 1

1 2

2

1 2

1

1

3 1

3

1

1 1

1 1

1 1

1 1

1

2

1

1

1

1