In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['o', 'e', 4407, 'M', 'D', 'U', 'f', '10021', 'S', 's', 'H'], [3815, 9569, 'D', 'U', 'f', '10021', 'K', 1569]