In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['J', 'k', 6483, 5537, 'f', 5721, 7633, '1903', 'J', 'Z', '2029', '437', 's', '8887', '9303', 'j', '6875', 'j', 'I', 9969, 2541], [4023, 'B', 9561, 'w', 'S', 1769, 'M', 'N', 'H', '1903', 'J', 'Z', '2029', '437', 's', '8887', '9303', 'j', '6875', 'C', 4891, 353, 9313, 'X', 'r', 1989]