In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['U', 6831, 519, 'K', '1863', 'O', 'O', 'm', 'Q', '6473', '9865', '6149', 'e', '7369', 'B', '1033', 'R', 'e', '2449', '6785', 'O', '807', '2723', '2663', 'w', 'I', '1925', 'r', 'U', '6809', 'G', 'i', 'T', 4611, 2807, 'b', 2079, 3625, 6563, 'G'], ['p', 'O', 9619, 6029, 'j', 1929, 2547, 'M', 559, 6217, '1863', 'O', 'O', 'm', 'Q', '6473', '9865', '6149', 'e', '7369', 'B', '1033', 'R', 'e', '2449', '6785', 'O', '807', '2723', '2663', 'w', 'I', '1925', 'r', 'U', '6809', 'F', 'y', 'd', 343, 'y', 'N', 'u', 2065, 6107, 1873, 'I', 'M', 'p', 8839, 'D', 4591, 2111, 1983, 'y', 9793, 'l']