In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['k', 'Y', 'M', 'S', 'b', '5315', 'u', '7211', 'r', '7981', 'W', 'K', 'Y', 'o', '7025', '4349', '9407', 'o', 'D', 'R', 'e', 'C', 'm', 'b', 'Y', 'N', 'N', 'x', 'b', 'L', 'O', 5553, 2311, 6483, 2627, 'i', 2833], [1695, 1929, 'X', 3997, 7401, 'O', 'J', 'W', 'v', 5639, 'S', 'P', 'c', 5689, 'S', 'b', '5315', 'u', '7211', 'r', '7981', 'W', 'K', 'Y', 'o', '7025', '4349', '9407', 'o', 'D', 'R', 'e', 'C', 'm', 'b', 'b', 'k', 1027, 'x', 3925, 'T', 'S', 1585, 'Q', 5061, 'e']