In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['n', 2189, 6197, 9967, 'm', 'T', 'e', 'z', 'Z', 'y', 'A', '2011', '9495', 'c', 'u', 'N', 'a', 8725, 2289, 2471, 'e'], [1021, 3999, 't', 'a', 7027, 'P', 4977, 'g', 'e', 'z', 'Z', 'y', 'A', '2011', '9495', 'c', 'u', 'N', 'b', 1845, 6631, 4085, 7609, 'V', 'H', 1139]