In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6635, 'R', 'I', 2817, 'z', 2399, 'b', 'e', 2499, 'P', 'L', 2251, 'a', 'W', 1657, 2871, 'n', 'Q', 3547, 6661, 'z', 1325, 833, 'a', 'r', '7915', '5521', 'S', 'X', 'P', '3827', 'w', '1053', '7789', 'O', '1087', 't', '2501', '3261', '949', 'B', '81', '9885', '8411', '3459', 'l', 'F', 'L', 8289, 6785, 'G', 6079, 13, 'y', 4879, 'v', 'P', 'e', 1581, 'b', 'M', 4555, 'P'], ['J', 'd', 5347, 'O', 7963, 1453, 3327, 'z', 1315, 'R', 'a', 'r', '7915', '5521', 'S', 'X', 'P', '3827', 'w', '1053', '7789', 'O', '1087', 't', '2501', '3261', '949', 'B', '81', '9885', '8411', '3459', 'l', 'b', 7089, 'I', 'G', 4843, 949, 6871, 6975]