1 2 1 2 1 1 1

2 1 1 1 1 1 1 1 1

2 1 1 2 1 2 1 1

1 1 2 1

1 2 1 2 1 1 1 1

2 1 1 1 1 2 1 1 1

2 1 1 1 2 1 1 1 1