In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['e', 9403, 3873, 'k', 'k', 5449, 'u', 4223, 't', '8245', 'N', '1283', 'c', 'c', 'X', '3949', '3907', 'N', '6133', '6453', '1215', '5797', 'f', 't', '8075', 'q', 'Q', '8221', '9311', '9667', '8293', 'x', 'v', 'Z', '5767', 'F', 't', 6833, 1075, 7527, 't', 5273, 6295, 1801, 'e', 'b', 'q', 2187, 2405, 'O', 'L', 'J', 'a', 2033, 'W', 3297, 'Z', 'J'], ['U', 'M', 'Z', 4207, 3289, 627, 't', '8245', 'N', '1283', 'c', 'c', 'X', '3949', '3907', 'N', '6133', '6453', '1215', '5797', 'f', 't', '8075', 'q', 'Q', '8221', '9311', '9667', '8293', 'x', 'v', 'Z', '5767', 'N', 9687, 2231, 'R', 4573, 'P', 'b', 971, 8863, 'H', 345, 8639]