In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['J', 'U', 7137, 'W', 'E', 'R', 'C', '6945', '8107', 'x', 'K', 'V', 'k', '2363', 'E', 'V', 'A', '7603', 'C', '5695', 'm', 'Z', 9893, 7521, 'M', 'c', 'K'], [5233, 3381, 1929, 'W', 3723, 'n', 7043, 8253, 't', 'i', 'j', 7267, 'C', '6945', '8107', 'x', 'K', 'V', 'k', '2363', 'E', 'V', 'A', '7603', 'C', '5695', 'm', 'R', 4681, 'd', 527, 9037, 7851]