In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7539, 65, 'M', 'W', 'D', 'v', 551, 1485, '4215', '8097', 'l', 'm', 'Z', 'O', 'B', 'N', 'U', 'B', 'k', 'y', '419', 'u', '3135', '8121', '6085', '1699', 'X', '2809', 'T', 'K', 't', 211, 'C', 4041, 'P', 'y', 'V', 1631, 'S', 'Q', 8537, 171], ['U', 'g', 9545, 'A', '4215', '8097', 'l', 'm', 'Z', 'O', 'B', 'N', 'U', 'B', 'k', 'y', '419', 'u', '3135', '8121', '6085', '1699', 'X', '2809', 'T', 'V', 9069, 3547, 'k', 8349, 4891, 'Z', 6565, 2659]