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159: 3 bulldozer-heptacubes, 3 notch-heptacubes, 3 pinwheel-heptacubes
1 solution for A, 3 solutions for B and 4 solutions for C
3×
3×
3×
empty cube at A
empty cube at B
(1 of 3)
empty cube at B
(2 of 3)
empty cube at B
(3 of 3)
3× 
3× 