In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1951, 'R', 3055, 9005, 'U', 'S', 7613, 'M', '1603', '1995', '6705', 'q', 'p', 'S', 'a', 'C', '8939', 'k', '9803', 'f', 'p', 'O', 'm', 's', 'C', 'h', 'B', 341, 'H'], ['K', 2213, 'r', 'j', 7601, 'f', 2919, 'M', '1603', '1995', '6705', 'q', 'p', 'S', 'a', 'C', '8939', 'k', '9803', 'f', 'p', 'O', 'm', 'G', 4727, 'd', 5283, 6559, 'K', 'A', 'R', 'B', 3903]