In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9399, 3419, 'R', 'k', 'C', 467, 6551, 5549, 2677, 1623, 8483, 'l', '7071', 'y', '1453', '8909', '6031', 'C', '7341', 'Q', '5751', '4815', 'a', '7567', 'o', 7615], ['p', 'T', '7071', 'y', '1453', '8909', '6031', 'C', '7341', 'Q', '5751', '4815', 'a', '7567', 'y', 'Z', 8273, 'r', 10009, 3553, 17, 'w', 'Y', 'k']