In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3715, 't', 6339, 2171, 'o', 3009, 'O', 8463, 'H', 4723, 'l', 'k', 'V', '4053', '523', 'q', '5985', 'R', '5019', 'U', '2643', '7963', 'v', 'j', 'b', 'J', 9651, 7073, 7665, 'e', 'I'], [9047, 6153, 's', 'y', 'Y', 'U', 'l', 'k', 'V', '4053', '523', 'q', '5985', 'R', '5019', 'U', '2643', '7963', 'v', 'j', 'i', 'w', 9209, 5997, 'v', 'X', 6399, 5473, 75, 'A', 4785]