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49: 3 N1-pentacubes, 3 Q-pentacubes
1 solution for C, 5 solutions for F, 5 solutions for J, 6 solutions for B, 6 solutions for H, 7 solutions for A, 7 solutions for E, 7 solutions for G, 7 solutions for K and many solutions for D

  3×

empty dicube at C