如果我有如下清单,
[[1, 2], [3, 4], [1, 5], [2, 6], [4, 8], [5, 6], [6, 7],
[7, 8], [6, 10], [7, 11], [8, 12], [10, 11],
[10, 14], [12, 16], [14, 15], [15, 16]]
另一份清单如下:
([[1, 2], [2, 3], [3, 4], [1, 5], [4, 8],
[6, 7], [5, 9], [6, 10], [7, 11], [8, 12],
[9, 13], [10, 11], [12, 16], [13, 14], [14