In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['K', 'G', 795, 'f', 'W', 'n', 'P', 'x', 'y', '479', 'Y', '3701', 'q', '3339', '2483', 't', '9685', '9569', '6265', 's', '4725', 'H', 'I', '6277', 'i', 'b', 'k', 'k', 3349, 'r', 'B', 1219, 857], [5923, 589, 'C', 'J', 'L', 'x', 'X', 'r', '479', 'Y', '3701', 'q', '3339', '2483', 't', '9685', '9569', '6265', 's', '4725', 'H', 'I', '6277', 'i', 'b', 'g', 3599, 'i', 319, 9511, 'q', 581, 3387, 'l', 'B', 'I']