In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[909, 'A', 'p', 633, 8061, 'H', '5935', '2795', 's', '6073', '5511', 'p', 'u', 8449, 'd', 7843, 'N'], ['P', 9989, '5935', '2795', 's', '6073', '5511', 'p', 'U', 'V']