 Numbers in (red) are total possible solutions for this shape.Notes:In the 1x3x11 there is a solution using the 1x3x4 and the 1x3x7. This 1x3x15 uses a 1x3x8 and a 1x3x7. There are other solutions that use a 1x3x4 and a 1x3x11 as well as a 1x3x10 and a 1x3x5. Can you find them?
| 
