2 x 3 x 7 (2)
The 2×3's level, as with the early levels of the flat shapes, are quite simple because many piece shapes define the orientation of placement within the final puzzle shape.
2 x 3 x 9 (4)
2 x 3 x 10 (8)
In the 2x3x10, simple logic will lead you to figure out which piece cannot be part of this shape which leaves you with 10 pieces to work around that Key 'H' piece.
