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158: 3 bulldozer-heptacubes, 3 cleaver-heptacubes, 3 why-heptacubes
1 solution for D, 2 solutions for B, 4 solutions for A and 6 solutions for C
3×
3×
3×
empty cube at D
empty cube at B
(1 of 2)
empty cube at B
(2 of 2)