In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['P', 'S', 9171, 'k', 'W', 4523, 'Z', 4167, 'c', 1143, '4943', '2193', '6839', '5745', 'N', '219', '9797', '8987', '9105', '1975', '3513', '81', 'D', 'n', 'R', 'J', 'z', 'O', 'f', 2527, 7395, 'v', 6495, 9929, 'W', 8051], [9499, 't', 1453, 5771, 7923, 857, 359, 3273, 'a', 6789, '4943', '2193', '6839', '5745', 'N', '219', '9797', '8987', '9105', '1975', '3513', '81', 'D', 'n', 'h', 'f', 2835, 9965, 2423, 6015]