In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3521, 'O', 3157, 'J', 'D', 'k', 'D', 'M', 8839, 6585, 'C', 2363, 'Y', 'z', 349, 'E', 't', 8787, 'o', 'a', 8987, '2279', 'x', '4281', 'a', '359', '5751', '5267', '1387', '6923', '8561', '9699', '9631', 'R', '1973', '8697', 'V', 'z', '8399', 'H', '69', 'Z', '5971', 'h', 519, 'w', 'n', 'S', 8915, 'P', 9455, 2347, 1381, 1825, 647, 'p', 1, 9133, 'l', 7331, 1389, 3675, 'h'], ['W', 'o', 7333, 'x', 9123, 1881, 4793, 'C', '2279', 'x', '4281', 'a', '359', '5751', '5267', '1387', '6923', '8561', '9699', '9631', 'R', '1973', '8697', 'V', 'z', '8399', 'H', '69', 'Z', '5971', 'G', 'U']