In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9469, 'b', 'x', 'S', '6081', '5847', 'k', 'p', 'p', 'Z', 'W', 'u', 'Z'], ['z', 'l', 3611, 'n', 4211, 'S', '6081', '5847', 'k', 'p', 'N', 5561, 'P', 3661]