In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['m', 'v', 6969, 5049, 3215, 3975, 33, 'm', 'p', 'E', 'l', 'G', 'v', '1551', '2887', 'r', '3211', '8815', '143', 'a', 9669, 175, 1041], [7175, 'z', 7279, 6757, 'w', 'y', 1903, 'p', 'E', 'l', 'G', 'v', '1551', '2887', 'r', '3211', '8815', '143', 'H', 7997, 4603, 4331, 821, 'i']