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291: 3 bulldozer-heptacubes, 3 hanger-heptacubes, 3 spatula-heptacubes
3 solutions for D, many solutions for A, many solutions for B and many solutions for C
3×
3×
3×
empty cube at D
(1 of 3)
empty cube at D
(2 of 3)
empty cube at D
(3 of 3)
3× 