In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9551, 's', 'd', 'k', 'd', 'h', 'l', 'Z', 'y', 5269, 'H', 2673, 'N', '5453', '4693', 'b', '5637', '8249', '9839', 'u', '9185', '697', '9863', '6973', '8951', 'V', 'q', 5513, 'D', 'b', 'Q', 'z'], [8555, 'g', 5335, 6147, 'p', 'q', 8775, 2771, 'v', 5785, 'V', 'N', '5453', '4693', 'b', '5637', '8249', '9839', 'u', '9185', '697', '9863', '6973', '8951', 'D', 1593, 8245, 8157, 'x', 'H']