In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['R', 4033, 'Y', 'C', 637, '845', '4897', '8059', 'Y', 'q', '5117', '4723', '4177', '4525', 'V', 'a', 1559, 1837, 9273, 3337, 'O', 'g'], [1469, 'x', 'E', 'v', 'k', 8777, 'V', 'C', '845', '4897', '8059', 'Y', 'q', '5117', '4723', '4177', '4525', 'G', 'p', 'I', 5851, 'p', 3669]