Urutan bilangan 21,22,23,24, 25,..., 26, 27, 28, 29, Bilangan sebelum 2 adalah ..., 3, 2, 1, 0, Bilangan sesudah 5 adalah ..., 4, 6, 7, 8, 10+6, 6, 10, 11, 16, 9-6, 3, 4, 15, 16

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