2x1
2
5x1
5
10x1
10
12x1
12
20x1
20
2x3
6
5x3
15
10x4
40
12x4
48
20x40
80
2x8
16
5x5
25
10x8
12x5
60
20x9
18
2x9
5x9
45
10x10
100
12x10
120
20x20
2x15
30
5x10
50
10x100
1,000
12x100
1200
20x90
180