In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['K', 7199, 'b', 2585, 7581, 'X', 6129, 'C', 'h', '1513', 'n', 'Q', 'C', 'D', 'r', 'B', 'M', 'R', '4775', 'l', 847], ['g', 'G', 'r', 849, 2327, 'H', 'u', 'r', 'y', '1513', 'n', 'Q', 'C', 'D', 'r', 'B', 'M', 'R', '4775', 'M', 'l', 'k', 'L', 'r', 'G']