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6. Three are reflexive pairs of the other three. They are made of 4 units each 3x4x6. To make the pieces, begin by making six "L" shaped pieces from three of the blocks (see photograph). Then attach a forth block to all six off the possible 6 by 4 block faces resulting in three of the blocks in one layer and the forth in the other.
1 for each packing. The wonderful matter is the way you can transform one solution into another. | |||||||
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