In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8693, 9473, 'e', '8729', 'v', '2055', '8735', '4823', '2253', 'K', '7165', 'S', 'X', '7221', 'u', 'O', '4925', '3721', '1317', 'A', 'j', '837', 'f', 'U', '5059', 'v', 'e', 'I', 'M', 'S', 'x', 4261, 'z', 'y', 'O', 'Z', 'P', 7405, 'W', 4479, 'C'], [1551, 'Q', 'D', 'z', 'e', 'p', 4239, 'M', 'e', '8729', 'v', '2055', '8735', '4823', '2253', 'K', '7165', 'S', 'X', '7221', 'u', 'O', '4925', '3721', '1317', 'A', 'j', '837', 'f', 'U', '5059', 'v', 'e', 'I', 'M', 'r', 9929, 2661, 'X']