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161: 3 binarystar-heptacubes, 3 bulldozer-heptacubes, 3 hanger-heptacubes
1 solution for D, 3 solutions for A, 5 solutions for C and 6 solutions for B
3×
3×
3×
empty cube at D
empty cube at A
(1 of 3)
empty cube at A
(2 of 3)
empty cube at A
(3 of 3)
3× 