In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['R', 2925, 5397, 'A', 157, 'L', 3673, 2405, 1251, 4511, 5461, 'D', 9489, 3301, 'P', 'C', 2793, 's', 'U', 'F', 'u', '8995', '3131', '255', 'K', 'P', '6265', '5145', '5749', 'Z', '5301', 'v', 'U', '8261', 'F', '5225', '1819', '5929', 'W', '2075', '6363', 'U', 3929, 'a', 2683, 7249, 6551, 'b', 'j', 'V', 8553, 's', 'G'], [7535, 9705, 'V', 'F', 'U', 'F', 'u', '8995', '3131', '255', 'K', 'P', '6265', '5145', '5749', 'Z', '5301', 'v', 'U', '8261', 'F', '5225', '1819', '5929', 'W', '2075', '6363', 'C', 'w', 359, 'a', 'm', 1347, 'A', 3239, 2037, 'B', 8927, 'E', 'D', 8321, 'x', 'n', 'q']