In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['J', 'm', 1459, 6539, 't', 'I', 'q', '5941', '8225', 'c', '513', 'c', '9193', '9491', 'L', 3221, 319, 'x', 2627, 3635, 1577], ['k', 7381, 6901, 'I', 'q', '5941', '8225', 'c', '513', 'c', '9193', '9491', 'v', 'I', 9511, 5057, 's', 'D', 'e', 'U']