In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9423, 1197, 'b', 'u', 1289, 'X', '8597', 'D', '3889', '6373', '2167', 'd', 'i', 'c', '5211', '4451', '8143', 'S', '7991', 'v', 'A', 'n', '6375', 'Y', '2711', '2715', 'K', '2219', '1817', '8945', '5311', '5817', 'r', 'W', 'p', 'Q', 7983, 4101, 1193, 'Z', 'l', 75, 'i', 'n', 'z', 1519, 8577, 139, 'g'], ['B', 279, 'e', 't', 'X', 3783, 'v', 'W', 3429, 7215, 'M', 5965, 'G', 4307, 6667, 6317, 'w', 8387, '8597', 'D', '3889', '6373', '2167', 'd', 'i', 'c', '5211', '4451', '8143', 'S', '7991', 'v', 'A', 'n', '6375', 'Y', '2711', '2715', 'K', '2219', '1817', '8945', '5311', '5817', 'r', 'Z', 'D', 7615, 2903, 'Z', 8267, 'B', 'U', 'k', 'P', 'M', 'G', 2409, 'u', 'j', 'z', 'a', 'Z', 'D']