In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8379, 6541, 'n', 'T', 2485, 6971, 9681, 449, 'y', 'C', 'f', 'R', 5377, 'h', 'E', 'L', 4365, 'j', 21, 'x', '7973', '8559', '8973', 'v', 'I', '8685', '333', '8605', '9267', '4965', 'l', '9955', '5383', '2531', '9925', '5981', '7589', '4877', 'P', 'k', '2233', 't', '4699', 'W', 's', 8169, 'X'], ['A', 'V', 7873, 'R', 6629, 681, 2379, 4477, 353, 5669, 'x', '7973', '8559', '8973', 'v', 'I', '8685', '333', '8605', '9267', '4965', 'l', '9955', '5383', '2531', '9925', '5981', '7589', '4877', 'P', 'k', '2233', 't', '4699', 'W', 'x', 'A', 1307, 8041, 5963, 3903, 2863, 7597, 6917, 537, 't', 'h', 'V', 'P', 377, 'q']