In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['L', 8073, 5633, 7145, 9235, 'D', 'y', 'B', 'Z', 'C', 'N', '1459', 'D', 'W', 'p', 3409, 2281], ['a', 'Q', 3987, 4969, 5853, 'D', 'y', 'B', 'Z', 'C', 'N', '1459', 'D', 'y', 'k', 'T', 'u']