1 2
3
4
5
6
7
8
9
1

2
3
4
5
6
7
8
9
2
2
4
6
8
10
12
14 16
18
3
3
9
12 15 18 21 24
27
4
4
8
12
16 20 24 28 32 36
5
5
10 15 20 25 30
35 40 45
6
6
12 18 24 30 36 42 48 54
7
7
14 21 28 35 42 4956
63
8
8
16 24 32 40 48 56 64
72
9
9
18 27
36 45 54 6372 81
rows only.
columns only.
both rows and columns.
neither rows nor columns.
Mark thing and return