In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6111, 'M', 'J', 'D', 'c', '2405', 'r', '2297', 'T', 'R', '1297', '8271', '2269', 'z', '2783', '9115', 'N', 'O', '4683', 'Q', 's', 'J', 'H', 'H', 'L', 'h', 'a', 'b', 7285, 'O', 8387, 1801, 'f', 'w', 'K', 'H', 'O', 'H', 421, 9699, 1211, 'z', 'b', 2275], [7399, 2977, 9267, 'X', 'y', 7589, 8675, 'a', 7175, 3147, 3787, 'R', 'e', 2107, 9973, 5337, 'D', 'k', 7947, 'D', 'c', '2405', 'r', '2297', 'T', 'R', '1297', '8271', '2269', 'z', '2783', '9115', 'N', 'O', '4683', 'Q', 's', 'J', 'H', 'H', 'm', 2251, 6613, 'k', 3083, 8153, 'v', 'i', 2531, 3241, 1979, 6695, 3207, 'f']