In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['a', 'b', 5499, 'f', 'v', 't', '9697', 'g', '1073', '1019', 'K', 't', 1057, 6119, 3225, 7031, 'Q', 'v'], [4905, 'W', 'a', 5965, 'w', 2389, 'H', 'g', 'f', 'v', 't', '9697', 'g', '1073', '1019', 'K', 'n', 'k', 'v', 4631, 8937, 1269]