In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['W', 9237, 4639, 771, 'D', '925', 'l', '9347', 'U', 8619, 3353], [7005, 'f', 'n', 'Z', 'D', '925', 'l', '9347', 'w', 5207]