In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7681, 5551, 'D', '9589', '4647', 'Q', 'I', 'b', 'O'], [4291, 'n', 'y', 'V', '9589', '4647', 'Q', 'I', 'C', 'x', 805, 5737]