In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['L', 'h', 'z', 3383, 'k', 'M', 'D', 'F', 'J', '4549', 'S', 8257, 'O', 3873, 5703], ['R', 471, 4967, 'P', 471, 'k', 'M', 'D', 'F', 'J', '4549', 'L', 6695, 'F', 3287, 'n', 9141]