216 Figure 4: First step of realization, same decision for the two hierarchies, allocate category 2 (green). Figure 5: Second step of realization, still same decision for the two hierarchies, allocate category 3 (yellow). 1 1 1 1 2 3 3 4 4 4 4 4 5 5 5 5 1 1 1 1 2 3 3 4 4 4 4 4 5 5 5 5 1 1 1 1 2 3 3 4 4 4 4 4 5 5 5 5 1 1 1 1 2 3 3 4 4 4 4 4 5 5 5 5
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