In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2169, 9947, 'h', 3615, 'z', 'S', 2303, 'E', '881', 'n', '1639', '1395', 'v', '81', 'C', '1099', 'u', 'k', 5617, 8191, 'A', 'Z', 'c', 3903], [6071, 9917, 8629, 9263, 6391, 9493, 'E', '881', 'n', '1639', '1395', 'v', '81', 'C', '1099', 'M', 9353, 's', 'b', 'X', 'C', 'U', 'Q']