In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4393, 'p', 'O', 3067, 6975, 3195, 'F', '4123', '4441', 'b', '1305', 'R', 'u', '1853', '461', 's', '7113', '5547', 'i', '5059', 'w', 'R', 'G', 'U', 'p', '6161', 'o', 3633, 7909, 2673, 'B', 'G', 473, 1459, 'A', 'U', 'Z', 'c', 5611, 7789], [8643, 2941, 1453, 8913, 6993, 'F', '4123', '4441', 'b', '1305', 'R', 'u', '1853', '461', 's', '7113', '5547', 'i', '5059', 'w', 'R', 'G', 'U', 'p', '6161', 'e', 7507, 7987, 9113, 'h', 8561, 4817, 't', 'q', 8679, 2461, 4839]