In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['a', 'y', 8071, 6669, 'n', 'W', '3619', 's', 'E', 'N', '8415', '4641', 'j', '8547', 'R', '9243', '1719', '6621', 'C', 'u', '7705', 'S', 'X', '7745', '8721', 'I', 'C', 'X', 'G', 3867, 9407, 'r', 'S', 8697, 'O', 3723, 'v', 6917, 4443, 'o', 5157, 5707, 3213, 1655], [8441, 9625, 'f', 6485, 'g', 7121, 6529, 1579, 8739, 10005, 43, 495, 81, 'n', 'W', '3619', 's', 'E', 'N', '8415', '4641', 'j', '8547', 'R', '9243', '1719', '6621', 'C', 'u', '7705', 'S', 'X', '7745', '8721', 'k', 9113, 1851, 'm', 'R', 9685, 'L', 525, 'g']