In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['c', 1211, 'O', 'j', '9845', '145', 'R', '10011', 'i', 'g', 'W', '3183', '9985', 'L', 'q', 4185, 'k', 5087, 8911, 'w', 'L', 2499, 6783, 'K'], ['C', 8491, 2373, '9845', '145', 'R', '10011', 'i', 'g', 'W', '3183', '9985', 'L', 'y', 2127, 'w', 7623, 4725, 'f', 2561, 1531]