In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7561, 4669, '2713', '8933', '7477', 'y', '6963', 'U', 'A', 3049, 'N', 679, 'O'], [571, 'b', 6459, 'd', 'S', '2713', '8933', '7477', 'y', '6963', 'U', 'a', 4325, 'b', 'K', 3607]