7

4 1 3 1 3

2 1 3 1

2 1 3 1 1

2 1 3 1 1

1 2 1 3 1 1

3 1 3 1 1

3 1 3 1 1

4 1 1

4 1 1

5 1 1

4 1 1

4 1 1 1

4 1 1 1

4 1 1

7 1

2 2 1 1

2 1 2 1