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Even allocation in a multilevel hierarchy. A parent value of 18 is allocated to three children as a value of 6. One of them has two children and allocates a value of 3 to both of them. Another has one child, and allocates a value of 6 to it. The last one has three children and allocates a value of 2 to each of them. Thus, the cells in the first allocated level have equal values, but the cells in the second allocated level have values that vary with the number of descendants.