In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[821, 'v', 'e', 5439, 4959, 6931, 1089, 'x', 7031, 8779, 1059, 6563, 'c', 617, 'r', 'K', 'L', 'E', 7833, 'Y', 'O', 7277, '9669', '5227', '13', '4115', '8311', 'u', '63', '2311', 'k', '5263', 'S', 'B', '8279', '7615', 's', '7173', 'q', '3413', '105', '5021', 'u', 'C', '5803', 'a', 7835, 'M', 'E', 'L', 7441, 8143, 'G', 'x', 's', 'n', 4809, 'u', 'L', 'g'], ['W', 'd', 'C', 4909, 'i', 85, 'J', 6511, 5681, 3969, 'f', 'f', 'Y', 'h', 4313, 4765, 'z', 'l', 6733, 8273, 'y', '9669', '5227', '13', '4115', '8311', 'u', '63', '2311', 'k', '5263', 'S', 'B', '8279', '7615', 's', '7173', 'q', '3413', '105', '5021', 'u', 'C', '5803', 'B', 6301, 'r', 5081, 'q']