In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['Q', 3173, 5569, 'j', 'C', 'u', 'H', 't', 'p', 717, 'f', 4031, 7993, 'V', 'X', 'D', 179, 'H', '8801', '9387', 'L', '9007', '8893', 'z', 'u', 'Q', '4673', '8519', 'H', 'y', 'K', 'O', 'w', 'U', '6865', '8945', '277', 'g', 7795, 'L', 8631, 'r'], [4503, 'd', 'O', 1583, 'H', '8801', '9387', 'L', '9007', '8893', 'z', 'u', 'Q', '4673', '8519', 'H', 'y', 'K', 'O', 'w', 'U', '6865', '8945', '277', 'v', 6887, 9023]