0 [1, 1, 2, 2, 1, 1]
2 [1, 3, 1, 1]
1 [2, 1]
0 [1]
3 [1, 1, 3, 1]
2 [1, 2]
1 [1]
3 [2, 1, 3, 1, 1]
0 [1, 3, 1, 1]
1 [2, 1]
0 [1]
2 [2, 2, 1]
0 [2, 1]
0 [1]
1 [3]
! 1 [0]
! 1 [1, 0]
! 1 [1, 1, 0]
4
2 2 2 1