But it's not hex. You have to count down from 128 normally or 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10. The two can't be combined.
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"If so, then how does one count to 10 on the Mac?"
"128, 127, 126, 125..."
-Pallas Athene, Member of the Obish Consensus