In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4139, 4753, 'e', 2593, 'I', 'l', 'u', 'h', 3079, 1699, 'E', 'J', '2397', 'R', 'A', '2327', '6771', 'm', 'e', 'd', '863', 'Q', 'G', '7669', 'i', '1793', 'j', '2985', '929', 'C', '6319', 'n', 'p', 'H', '9159', 'I', 8617, 1577, 't', 'f', 'n', 'H', 'x', 'y', 4795, 6549, 'l', 'a', 'L', 5889, 'b', 5257, 'a', 9109, 103], [8081, 6053, 469, 6977, 'a', 'j', 3453, 't', 'i', 'U', 'w', 'c', 8975, 3195, 'm', 'm', 2249, 'E', 'J', '2397', 'R', 'A', '2327', '6771', 'm', 'e', 'd', '863', 'Q', 'G', '7669', 'i', '1793', 'j', '2985', '929', 'C', '6319', 'n', 'p', 'H', '9159', 'E', 9791, 'F', 4179, 5783, 1449, 'J', 7805, 'Z', 7345, 'z', 'A', 3329]