In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4683, 2257, 5941, 3375, 9645, 4309, 'i', 'D', 6155, '1973', 'L', '7091', 'q', 's', 'Z', '5381', '7239', '6331', 'O', '8947', 'h', 4965, 'k', 'X', 'L', 'K', 7707, 1897, 4893, 7693], ['u', 'X', 1977, 'b', 'b', 8917, 3873, 'g', 4133, 8973, 'B', '1973', 'L', '7091', 'q', 's', 'Z', '5381', '7239', '6331', 'O', '8947', 'R', 2635, 's', 'Z']