[0, 1, 2, 3, -2, 5, 6, 7, 8, 9, 10]
[0, 1, 2, 3, -2, 5, 6, 7, 8, 9, -2]
[0, 1, 2, 3, -2, 5, 6, 2, 8, 9, -2]
[0, 1, 2, 3, -2, 5, 2, 2, 8, 9, -2]
[0, 1, 2, 3, -2, 5, 2, 2, 8, -1, -2]
[0, 1, 2, 3, -2, 5, 2, 2, 8, -1, -2]
IMPOSSIBLE