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157: 3 bulldozer-heptacubes, 3 cleaver-heptacubes, 3 cobra-heptacubes
1 solution for C, 2 solutions for D and 3 solutions for B

  3×   3×

empty cube at C


empty cube at D
(1 of 2)

empty cube at D
(2 of 2)

empty cube at B
(1 of 3)

empty cube at B
(2 of 3)

empty cube at B
(3 of 3)