In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['K', 1657, '5001', '8571', '2343', '9471', 'P', '6369', '9299', 'X', 'n', 3631, 'o', 'm'], ['P', 6249, 7565, 's', 1041, 'V', 'D', '5001', '8571', '2343', '9471', 'P', '6369', '9299', 'n', 'U', 'z', 2559, 5379, 6985, 6059]