rows: 3 1 | 1 3 2 | 2 7 | 3 6 | 1 4 | 1 1 1 | 4 1 | 5 1 | 5 1 | 6 2
cols: 9 | 2 4 | 1 4 | 2 4 | 4 3 | 4 1 | 1 3 | 4 | 4 1 | 10
