In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['D', 2205, '6285', '4929', 'k', 'H', '4191', '2383', '2423', 'u', 'f', 9375, 7575, 9625, 'a', 669, 'X'], [27, 'V', 6985, 9951, 3715, '6285', '4929', 'k', 'H', '4191', '2383', '2423', 'u', 's', 'f', 'P']