In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['J', 'F', 'T', 5683, 'D', 'Z', 'G', '5921', '209', 'N', '1075', '5635', 'v', 'x', '5365', '5643', 'U', '9335', 'Z', 'a', 't', 9261, 2457, 5427, 'u'], ['t', 'L', 'B', 'C', 3079, 7271, 8443, 'S', 4967, 'G', '5921', '209', 'N', '1075', '5635', 'v', 'x', '5365', '5643', 'U', '9335', 'Z', 'm', 9305, 'L', 3821, 2851, 1031, 'X', 7741, 'W', 3551, 'n', 'Y']