In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4969, 'H', 'C', 'l', 'U', 9373, 'M', 'm', 'r', 'x', 4497, 9799, 1241, 8827, 'Y', 'g', '4427', 'l', 'j', 'j', 'G', '9555', '2643', 'g', 'w', 'D', 'y', '3503', 'P', '5789', '8577', 'A', 'u', 9879, 7829, 'h', 'k', 'h', 'l', 'u', 5811, 1993, 4257], [7667, 'i', 5423, 55, 'n', 'h', 'S', 1127, 9705, 2725, 'W', 5119, '4427', 'l', 'j', 'j', 'G', '9555', '2643', 'g', 'w', 'D', 'y', '3503', 'P', '5789', '8577', 'A', 'O', 3691, 629, 'c', 9845, 715, 'Y', 'e', 'V']