Let N0, N1, N2, N3, N4, N5, N6, N7 be an (unknown) list of eight whole numbers with the property that
N0 = the number of times 0 occurs in the list.
N1 = the number of times 1 occurs in the list,
And so on.
Thus each Ni counts the number of times the number ‘i’ occurs in the list.
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