In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['B', 'G', 'm', 63, 'O', '6469', '683', 'T', 'Z', 'R', 'U', '3073', '6483', '537', 'k', 'r', 'o', '8673', 'r', 2411, 'C', 'i', 'V', 7861, 2239, 4679, 3059], [8867, 'U', 'c', 'R', 7893, 'L', 8993, '6469', '683', 'T', 'Z', 'R', 'U', '3073', '6483', '537', 'k', 'r', 'o', '8673', 'g', 'U', 'X', 'H', 'm', 8827, 'M', 5311, 't', 'y', 1769]