In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 6673, 'i', 3545, 8135, 'p', 9917, '5873', 'v', 'H', 'k', 'w', 't', '3387', '9705', '1563', 'y', '3545', 'w', 'P', '7827', '1397', 'W', '2585', 'S', 'K', '4823', '3541', '7089', '243', 'a', 'M', 'D', 'D', 'S', 'Q', 'A', 3419], [6289, 5499, 4299, 9223, 1139, 't', 7953, 'b', 'u', 2987, 2109, '5873', 'v', 'H', 'k', 'w', 't', '3387', '9705', '1563', 'y', '3545', 'w', 'P', '7827', '1397', 'W', '2585', 'S', 'K', '4823', '3541', '7089', '243', 'a', 'A', 8363, 'u', 'w']