In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4193, 6009, 'B', 'b', '993', '3465', 'E', '6307', '7333', 'v', '5233', 'p', '9939', '8313', 'f', '6047', '7343', '3159', '2319', 'F', 'y', '6065', 'X', 1453, 'N', 'f', 'O', 'a', 'E', 'o', 'u', 'W', 7941, 1679, 3697, 5449], ['q', 'l', 9367, 7085, 2527, 1803, 'i', 1359, 'D', 283, 897, '993', '3465', 'E', '6307', '7333', 'v', '5233', 'p', '9939', '8313', 'f', '6047', '7343', '3159', '2319', 'F', 'y', '6065', 'P', 'o', 'u', 'z', 6543, 'q', 'H', 'g', 8767, 's', 't', 221, 6929, 6765, 'V', 1875, 5761, 2855]