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与包含数字的数组存在数组。如何在保留序列的情况下查找和连接一个或多个元素相等的数组。
例如:
Input: [[1, 2], [4, 3], [2, 7], [3, 5], [5, 9]] Output: [[[1, 2], [2, 7]], [[4, 3], [3, 5], [5, 9]]]