Input: nums = [[3,1,2,4,5],[1,2,3,4],[3,4,5,6]] Output: [3,4] Explanation: The only integers present in each of nums[0] = [3,1,2,4,5], nums[1] = [1,2,3,4], and nums[2] = [3,4,5,6] are 3 and 4, so we return [3,4].

Input: nums = [[1,2,3],[4,5,6]] Output: [] Explanation: There does not exist any integer present both in nums[0] and nums[1], so we return an empty list [].