In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2881, 5345, 'd', 7179, 2681, 7799, 'H', 'T', 'l', 'a', 'K', 1387, 'j', 'C', 'Q', 't', 'i', '979', 'i', 'S', '1771', '9491', 'Z', 'B', '2465', 'O', '5877', 'L', '1969', 'W', 'H', 'l', 'X', 'V', 9669, 'H', 'l', 'D', 517, 'z', 'd'], ['k', 7307, 33, 7323, 'r', 'D', 'C', 'Q', 't', 'i', '979', 'i', 'S', '1771', '9491', 'Z', 'B', '2465', 'O', '5877', 'L', '1969', 'W', 'H', 'l', 'X', 'w', 4701, 7231, 't', 7839, 'k', 5249, 'c', 8817, 8701, 'x', 553, 1383]