In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2553, 9483, '1623', '2957', 'A', 'N', 'U', 7635, 7129], [3705, 5021, '1623', '2957', 'A', 'N', 'Q', 647, 5603, 6513]