In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['N', 9837, 'S', 'f', 'z', '7671', '5131', '2773', '3435', '2525', '2621', 'k', '1113', 'u', '9269', '4517', 'B', 'a', 'R', 'T', '3077', 'h', 'q', 'z', 'w', 'z', 'i', 9307, 1877, 1633, 9823, 'u', 'u', 8629, 'M', 411, 135, 'J', 'H', 'b', 'm', 669, 'i', 6935], [685, 6231, 'z', '7671', '5131', '2773', '3435', '2525', '2621', 'k', '1113', 'u', '9269', '4517', 'B', 'a', 'R', 'T', '3077', 'h', 'q', 'z', 'w', 'n', 2383, 2123, 5545, 'j', 'q', 4387, 2801]