In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7577, 3817, 'z', 'h', 3425, 'K', 'H', 'k', '1849', '905', 'F', '6519', '2689', 'i', 'y', 'W', '9733', '6227', '5773', 'W', 'x', 'y', 'H', 'Z', 'R', '4207', 't', 'x', '2159', 'H', 'F', 'z', 't', 4483, 'm', 'D', 'Q', 221, 1109, 341, 7379, 7783, 'V', 6673], [3019, 'l', 7691, 'r', 1567, 'g', 'q', 277, 6769, 9779, 6453, 3697, 'T', 3955, 4685, 1885, 'z', '1849', '905', 'F', '6519', '2689', 'i', 'y', 'W', '9733', '6227', '5773', 'W', 'x', 'y', 'H', 'Z', 'R', '4207', 't', 'x', '2159', 'E', 'p', 'X', 'Y', 3465, 3169, 9437, 'c', 'w']