In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['S', 4239, 6849, 'p', 5161, 521, 'N', 6491, 'b', 1825, 7913, 'D', 6667, 'd', 'V', '4861', 'f', 'r', 'Q', 'x', 'L', 'T', 'p', '299', 'G', 'p', '7809', '4083', 'C', '2715', 'Q', '3249', '7145', 'Q', '9227', 'b', '3549', 'K', '2819', '7959', 'T', 'W', 9881, 'v', 'p', 'A', 7479, 'd', 353, 'n', 'e', 'p', 'J', 7601, 1955, 5027, 'O', 'P', 9571, 'U', 449, 6707, 'S', 6903, 'Q', 5893, 'm', 1679, 'n'], ['C', 'y', 2219, 3797, 2043, 'e', 'L', 'A', 'C', 'N', 9657, 3923, 2171, 7591, 'd', 'V', '4861', 'f', 'r', 'Q', 'x', 'L', 'T', 'p', '299', 'G', 'p', '7809', '4083', 'C', '2715', 'Q', '3249', '7145', 'Q', '9227', 'b', '3549', 'K', '2819', '7959', 'T', 'b', 'R', 9051, 'r', 'u', 9739, 6381, 'm', 'A', 5925, 'N', 9399, 'J', 7261, 'n', 'A']