In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['H', 'z', 299, 9611, 7941, 'z', 5545, '547', 'E', '49', 'r', '221', 'W', 'u', '4675', 'e', 'P', 'Z'], ['m', 5613, '547', 'E', '49', 'r', '221', 'W', 'u', '4675', 'X', 4459, 'y', 'Q', 'Z', 'n', 'L']