In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['O', 'D', 6239, 57, 4039, 'l', '8967', 'H', 'L', 'C', '3913', 'c', '3591', 'U', 'p', '9317', '3315', '8689', '7221', 'r', 't', '7531', 'o', '891', 'W', 'X', '3213', '4641', 'v', 'H', 'o', '6327', 'V', 5209, 1569, 9831, 2047, 'C', 9481, 'y', 'l', 7503, 4525, 'd', 9981, 7243, 3395, 'D', 'L', 'P', 3171, 'a', 'K', 8817, 6207, 'A', 5139, 'k', 'S'], [6591, 'h', 2083, 'g', 1813, 'c', 1399, 'l', '8967', 'H', 'L', 'C', '3913', 'c', '3591', 'U', 'p', '9317', '3315', '8689', '7221', 'r', 't', '7531', 'o', '891', 'W', 'X', '3213', '4641', 'v', 'H', 'o', '6327', 'n', 2251, 5929]