In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['q', 'm', 2683, 'k', 'H', 'X', 8479, 3669, 'z', 'A', 'Q', '4235', '2469', '781', '4855', '8947', 'm', '4389', 'h', '2401', 'Y', 'H', '7693', 'C', 'C', 'p', 'H', 6513, 6815, 'c', 'K', 6739, 3283, 'b', 4699], ['U', 'C', 8935, 'E', 'n', 's', 2587, 'O', 'Q', '4235', '2469', '781', '4855', '8947', 'm', '4389', 'h', '2401', 'Y', 'H', '7693', 'C', 'C', 'u', 'y', 7385, 'v', 'G', 2415, 'k', 5639, 2679, 5141, 9427, 'D', 'x']