In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1531, 4241, 3633, 4869, 'J', 'O', 563, 3859, 1461, 'e', 'u', 'M', 9995, 'Y', 'L', '6927', '2037', 'Y', 'p', 'c', 'r', 'r', '9357', '9713', 'A', '6299', '8295', '7635', '8911', 'G', 'G', 'h', '6397', '629', '1067', '5341', '6841', 'C', 'h', '6753', '5049', 'p', '5197', 'b', 9709, 'j', 9431, 'Q', 793, 'E', 'Z', 8839, 1893, 'K', 'r', 3401, 'Q', 'M', 'C', 869, 'o', 'T', 1497, 'm', 'u', 5857, 'S', 'C', 9717, 909], [6361, 'w', 2669, 'U', 9783, 'Y', 'D', 8125, 2413, 't', 'J', 4573, 'V', 9869, 6023, 6427, 'J', 'r', 'w', 'n', 'Y', 'L', '6927', '2037', 'Y', 'p', 'c', 'r', 'r', '9357', '9713', 'A', '6299', '8295', '7635', '8911', 'G', 'G', 'h', '6397', '629', '1067', '5341', '6841', 'C', 'h', '6753', '5049', 'p', '5197', 'B', 8331, 'x']