In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['y', 6757, 33, 5381, 'P', '9167', 'o', 'N', 'G', 't', 'B', 3785, 's', 189, 's'], ['N', 'l', 6339, 'P', '9167', 'o', 'N', 'G', 't', 'l', 'V', 515]