In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['q', 'k', 'n', '8377', '3671', '4289', 'Y', '6971', 'j', '7537', 'c', 'z', '853', '9249', 'u', 'E', 'm', 4927, 3569, 'z', 'f', 8235, 8527, 1975, 989, 7905, 1155, 'y'], [7077, 'k', 2139, 6721, 'T', 6037, 'e', 'n', '8377', '3671', '4289', 'Y', '6971', 'j', '7537', 'c', 'z', '853', '9249', 'u', 'E', 'z', 7135, 'Y', 6401, 8079, 'B', 'j', 3051, 'o', 'S', 8495, 'O', 933, 7823]