In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4069, 4709, 7027, 'K', 's', '7411', '7971', '4897', '6433', 'U', '8229', 'W', 'b', 3357, 'H', 'V'], [9297, 'H', 'b', '7411', '7971', '4897', '6433', 'U', '8229', 'W', 'g', 'a', 'U', 'V', 5579, 'a']