Question: 24. How many unique ways are there to stack two 2 X 4 Lego bricks of the same color? Two stacks that look the same

24. How many unique ways are there to stack two 2 X 4 Lego bricks of the same color? Two stacks that look the same if you merely rotate them are considered to be the same arrangement. Here is one such stack, the original on top and the same stack after rotating 180* OO o o o O o o o O O o
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