In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['f', 253, 7547, 4491, 1903, 881, 'z', 123, 9273, 'S', 8971, 'p', 'V', '3265', 'o', 'g', '6407', '5449', 'L', '7807', '10019', 's', '7829', 'Q', 'E', '4403', 'J', '8311', 'j', 'q', 'k', 'g', 'p', 9873, 3207, 971, 8043, 'H', 'H'], [7475, 9005, 991, 6449, 3745, 'h', 8029, 3311, 'A', 'l', 'P', 'b', 'y', 'j', 'K', 'W', 's', '3265', 'o', 'g', '6407', '5449', 'L', '7807', '10019', 's', '7829', 'Q', 'E', '4403', 'J', '8311', 'j', 'q', 'R', 'F', 7839, 7329, 'X', 3845, 7973, 4927, 'a', 'h', 7001, 795, 9327, 8695, 'X']