In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['b', 7847, 'X', 7101, 8081, 'M', 'Z', 3113, 3999, 'g', 7305, 7941, 'O', 'O', 'H', '6211', 'a', 'k', '5083', '7705', '6385', 'x', '2289', '1273', 'W', '2721', 'O', '3375', '2093', '7371', '4735', 'G', '8063', 'Y', '4443', 'x', '7089', 'Q', 'M', 7451, 4359, 9415, 'V'], ['b', 'd', 3039, 'o', 921, 1211, 'E', '6211', 'a', 'k', '5083', '7705', '6385', 'x', '2289', '1273', 'W', '2721', 'O', '3375', '2093', '7371', '4735', 'G', '8063', 'Y', '4443', 'x', '7089', 'O', 9865, 6555, 't', 3059, 7405, 7819, 'O', 'W', 4801, 4139, 4385, 7925, 'O', 'D', 'U', 509]