In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[891, 1259, 'q', 9801, 3147, 1589, 'u', 'm', 'd', 21, 'm', 'E', 'a', 'K', 'N', '1387', 't', 'w', 'c', 'F', '2369', '2875', 'P', 'B', 'J', '9801', 'j', '6919', 'y', '3757', 'e', 'R', '7811', 'x', 't', '7071', 'W', 'b', 7489, 'B', 'z', 'r'], [8553, 'f', 5473, 9933, 'i', 'L', 'Z', 'r', 1103, 'a', 'H', 9257, 1277, 5689, 6551, 8359, 9607, 'E', 'a', 'K', 'N', '1387', 't', 'w', 'c', 'F', '2369', '2875', 'P', 'B', 'J', '9801', 'j', '6919', 'y', '3757', 'e', 'R', '7811', 'x', 't', '7071', 'W', 'i', 'E', 'V', 'S', 6121, 'q', 't', 'U', 1311, 'q', 3583, 7505, 265, 3415, 'j', 'w']