In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['R', 'c', 417, 6343, '993', '841', '4905', 'U', 'i', '937', '6283', 'e', '711', 'g', '3621', 'C', '8601', 'u', 'Y', '4007', 'A', 'c', 'o', 'Z', 'W', 8133, 'r', 'B', 'w', 'O', 7953], [3435, 'c', 'H', 8451, 'M', 6053, 6169, 233, 'x', 'Z', 1477, 'S', '993', '841', '4905', 'U', 'i', '937', '6283', 'e', '711', 'g', '3621', 'C', '8601', 'u', 'Y', '4007', 'v', 'm', 281, 'K', 'j', 1659, 'J', 5861]