In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2901, 's', 'N', 'Y', 6789, 6503, 5325, 2735, 'F', 'W', 'e', 5563, 'g', '787', '3713', 'E', '2161', 'M', 'Z', '855', '221', 'l', 'E', 'K', '2681', '2533', '3469', '3237', '1355', 's', 'S', 'm', '9223', '4319', '8883', 'U', 'k', 'W', 8641, 'U', 2749], [7483, 8513, 'u', 'l', 'L', 329, 'R', 9101, 'k', 'L', 5495, 8843, 1707, 'V', 'K', 'o', 'e', 7983, 7331, 'O', 229, 'y', 4901, 'Z', '787', '3713', 'E', '2161', 'M', 'Z', '855', '221', 'l', 'E', 'K', '2681', '2533', '3469', '3237', '1355', 's', 'S', 'm', '9223', '4319', '8883', 'U', 'k', 'j', 3703, 2391, 'G', 's', 'd', 'b', 391, 'Q', 6159, 'e', 'K', 'a', 'c', 'A', 7423, 41]