In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3443, 945, 'v', 9249, 2273, 'K', '4719', '343', 'L', '937', '4953', 'l', 'a', 'P', '1897', '4555', '5989', 'l', '3875', '979', 'c', 'V', '9389', '3333', 'z', '6687', '9177', 'W', 5531, 4709, 'q', 8869, 'T', 'Y', 'K', 'l', 2237, 'R', 'R', 1863, 1809, 9789, 965, 307], ['n', 3419, 'P', 8799, 'W', 'z', 6641, 'O', 'o', '4719', '343', 'L', '937', '4953', 'l', 'a', 'P', '1897', '4555', '5989', 'l', '3875', '979', 'c', 'V', '9389', '3333', 'z', '6687', '9177', 'D', 'y', 'B', 5527, 'R', 8377, 8171, 1013, 8373, 7033, 5037, 5389, 'O', 8287, 'y', 9547, 7041, 'M', 'f']