In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 2863, 'n', '5003', 'k', '4821', 'U', 'O', 'c'], [8839, 'e', 'n', '5003', 'k', '4821', 'U', 'V', 'V', 'U', 'L']