In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['M', 6637, 'd', 'D', 8611, 'U', 'm', 'y', 8085, 'M', 'W', 4845, 'l', 2477, 'f', 'B', 's', 'D', '7597', 'S', '2907', 'o', '1905', 'p', 'S', 'C', 'S', '6403', 'D', 'V', '5265', 'L', 'D', '6031', '2585', '7087', '3941', '573', 'c', 'b', 9083, 9449, 7629, 5633, 3843, 'R', 9421, 2693, 'M', 'b', 3739, 'l', 333], [6017, 'W', 2775, 'W', 4759, 'W', 'q', 'k', 'f', 4299, 5523, 'E', 5391, 'd', 2611, 'l', 5849, 9603, 3831, 'D', '7597', 'S', '2907', 'o', '1905', 'p', 'S', 'C', 'S', '6403', 'D', 'V', '5265', 'L', 'D', '6031', '2585', '7087', '3941', '573', 'o', 4621, 'N', 'c', 'R', 'V', 'p', 'm', 7625, 9815, 'b', 8449]