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72 (9 (3, 3), 8 (4, 2)), 72 (24 (12 (6 (3 (1, 3), 3, 2), 2, 6), 12, 2), 3…
72
9
3
3
8
4
2
72
24
12
2
6
6
3
2
3
1
3
12
2
3
1
3