In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6923, 275, 2257, 'Q', 1143, 7059, 9429, 'B', 'Y', 'z', 's', 'f', '5829', 'G', '1355', 'B', '1511', 'I', '2329', 'm', '8239', '8471', '4193', '4943', 'p', '4643', 'k', 'D', 'F', 'K', 'X', '9317', '3635', '5651', 'Q', 'A', 'R', 'J', 'M', 8131, 4629, 'V', 'A', 1317, 2741, 4891, 'p', 1523], ['z', 4053, 6909, 'x', 6029, 1663, 'W', 1903, 'B', 'Y', 'z', 's', 'f', '5829', 'G', '1355', 'B', '1511', 'I', '2329', 'm', '8239', '8471', '4193', '4943', 'p', '4643', 'k', 'D', 'F', 'K', 'X', '9317', '3635', '5651', 'l', 2765, 'z', 5877, 'D', 'g', 'y', 2867, 'x', 3899, 9689]