In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6343, 1653, 7751, 'M', 2993, 2445, 'l', 'K', '2533', 'z', 'X', 'm', '5695', 'P', 'f', 'F', '2497', 'c', '373', 'A', 'Z', 'o', 'T', '1955', '2817', '1723', 'V', 't', 'b', 1441, 'G', 9681, 'N', 'd', 'B', 2647, 7467, 19, 5323, 9381, 'Y', 'V', 5733], ['j', 'x', 259, 9871, 4051, 3163, 4385, 'P', 'k', 2637, 'T', 9861, 1651, 5353, 525, 'K', '2533', 'z', 'X', 'm', '5695', 'P', 'f', 'F', '2497', 'c', '373', 'A', 'Z', 'o', 'T', '1955', '2817', '1723', 'V', 'F', 'L', 6179, 6981, 5579, 'x', 631, 9423, 9923, 'L', 6965, 8613, 'y', 'e', 'r', 'q']