would do 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 2000, 3000, ...
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