In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[625, 979, 'I', 9631, 3853, 'u', 1165, 'l', 3913, 'R', 'C', 'Z', '8985', '1141', '1447', '7713', 'x', 'L', '6699', 'Y', '7865', '6111', 'C', 'Q', 'U', 'r', '8993', '503', 'G', 'K', 1517, 495, 4001, 239, 5145, 3105, 9123, 'k', 'A', 'R'], ['X', 'C', 8585, 7817, 'Z', 4767, 685, 1815, 6485, 2805, 2957, 4019, 'C', 'Z', '8985', '1141', '1447', '7713', 'x', 'L', '6699', 'Y', '7865', '6111', 'C', 'Q', 'U', 'r', '8993', '503', 'S', 'R', 'g', 4501, 9239, 'w', 'e', 7967, 8385, 'm', 2417, 'Y', 9977]