2x2?
4x1?
4
6x3?
18
8x3?
10x2?
20
2x4?
8
4x4?
16
6x5?
30
8x6?
48
10x3?
2x6?
12
4x6?
24
6x6?
36
8x7?
56
10x6?
60
2x8?
4x8?
32
6x7?
42
8x9?
72
10x10?
100
2x10?
4x10?
40
6x12?
8x0?
0
10x11?
110