1s at 1, 3, 5
2s at 7, 10, 13
3s at 19, 23, 27
4s at 16, 21, 26
5s at 8, 14, 20
6s at 4, 11, 18
7s at 9, 17, 25
8s at 6, 15, 24
9s at 2, 12, 22
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