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deck_width = 16;
deck_length = 16;
n_containers = 10;
n_classes = 3;

width = [6, 4, 4, 4, 4, 4, 4, 4, 4, 4];
length = [8, 6, 4, 4, 4, 6, 8, 8, 6, 6];
class = [1, 1, 1, 2, 2, 2, 3, 3, 3, 3];

separation = [|0, 0, 0|
               0, 0, 2|
               0, 2, 0|];