In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3521, 4141, 5615, 2285, 1421, 1561, 6619, 'v', '2021', '1231', '957', '1009', 'O', '3015', '2585', '629', '7651', '5935', 'c', 'H', 'g'], [2109, 6847, 7499, '2021', '1231', '957', '1009', 'O', '3015', '2585', '629', '7651', '5935', 'c', 'y', 167, 'F', 9891, 2235, 7085, 8269, 6893, 3737]