[7, 5, 1, 8, 0, 2, 9, 8, 3, 4]
0 [7]
1 [5, 7]
2 [1, 5, 7]
3 [1, 5, 7, 8]
4 [0, 1, 5, 7, 8]
5 [0, 1, 2, 5, 7, 8]
6 [0, 1, 2, 5, 7, 8, 9]
7 [0, 1, 2, 5, 7, 8, 8, 9]
8 [0, 1, 2, 3, 5, 7, 8, 8, 9]
9 [0, 1, 2, 3, 4, 5, 7, 8, 8, 9]
[0, 1, 2, 3, 4, 5, 7, 8, 8, 9]