15,
1,2X3X1
2,2X4X1
3,2X5X1
4,2X6X1
5,3X4X1
6,3X5X1
7,3X6X1
8,4X5X1
9,4X6X1
10,2X2X1
11,4X7X1
12,4X8X1
13,3X7X1
14,3X8X1
15,1X6X2