In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[93, 'H', 'd', 'z', 'G', 'u', '9033', '709', '6413', 'C', 'j', 8909, 5687], [9451, 2867, 'G', 'u', '9033', '709', '6413', 'Y', 'y']