[[13, 15], [], [11], [10, 12, 16, 19], [], [15], [17], [12, 13, 19], [10, 14, 15], [11, 14, 18, 19], [3, 8], [2, 9], [3, 7], [0, 7], [8, 9], [0, 5, 8], [3], [6], [9], [3, 7, 9]]
[[0, -1, 6, 4, -1, 2, -1, 2, 2, 4, 3, 5, 3, 1, 3, 1, 5, -1, 5, 3], [-1, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1], [6, -1, 0, 4, -1, 6, -1, 4, 4, 2, 5, 1, 5, 5, 3, 5, 5, -1, 3, 3], [4, -1, 4, 0, -1, 4, -1, 2, 2, 2, 1, 3, 1, 3, 3, 3, 1, -1, 3, 1], [-1, -1, -1, -1, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1], [2, -1, 6, 4, -1, 0, -1, 4, 2, 4, 3, 5, 5, 3, 3, 1, 5, -1, 5, 5], [-1, -1, -1, -1, -1, -1, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1], [2, -1, 4, 2, -1, 4, -1, 0, 4, 2, 3, 3, 1, 1, 3, 3, 3, -1, 3, 1], [2, -1, 4, 2, -1, 2, -1, 4, 0, 2, 1, 3, 3, 3, 1, 1, 3, -1, 3, 3], [4, -1, 2, 2, -1, 4, -1, 2, 2, 0, 3, 1, 3, 3, 1, 3, 3, -1, 1, 1], [3, -1, 5, 1, -1, 3, -1, 3, 1, 3, 0, 4, 2, 4, 2, 2, 2, -1, 4, 2], [5, -1, 1, 3, -1, 5, -1, 3, 3, 1, 4, 0, 4, 4, 2, 4, 4, -1, 2, 2], [3, -1, 5, 1, -1, 5, -1, 1, 3, 3, 2, 4, 0, 2, 4, 4, 2, -1, 4, 2], [1, -1, 5, 3, -1, 3, -1, 1, 3, 3, 4, 4, 2, 0, 4, 2, 4, -1, 4, 2], [3, -1, 3, 3, -1, 3, -1, 3, 1, 1, 2, 2, 4, 4, 0, 2, 4, -1, 2, 2], [1, -1, 5, 3, -1, 1, -1, 3, 1, 3, 2, 4, 4, 2, 2, 0, 4, -1, 4, 4], [5, -1, 5, 1, -1, 5, -1, 3, 3, 3, 2, 4, 2, 4, 4, 4, 0, -1, 4, 2], [-1, -1, -1, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, -1], [5, -1, 3, 3, -1, 5, -1, 3, 3, 1, 4, 2, 4, 4, 2, 4, 4, -1, 0, 2], [3, -1, 3, 1, -1, 5, -1, 1, 3, 1, 2, 2, 2, 2, 2, 4, 2, -1, 2, 0]]
3
4
2
3
4
2
-1
3
1
2