In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4979, 'E', '1411', 'O', '3777', 'F', 'k', '4549', '2161', 'L', 'k', 'Z', 'u', 'f'], [1671, 's', 'Q', 2123, 'z', 'U', 2483, '1411', 'O', '3777', 'F', 'k', '4549', '2161', 'g', 'b', 'b', 'S', 'R', 3107]