In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['W', 7091, 'k', 'c', 2197, '3225', '81', '9717', 'P', 'D', 'w', '9401', '6803', 'r', 'n', 'T', 9005, 'e', 5179], [1011, 8641, 'n', 9329, 3841, 2313, 3531, 3671, '3225', '81', '9717', 'P', 'D', 'w', '9401', '6803', 'r', 'n', 'I', 1619]