In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['Y', 'n', 749, 6083, 'P', '9129', 'm', 'g', 'i', 'G', 't', 'V', 'y', 'n', '4001', '5015', 'v', '1407', 'C', '6417', 'X', 'd', '6717', 'm', 'd', 'i', '15', '4647', 'V', 9383, 'O', 'P', 'o', 'a', 'a', 3905, 'b', 'Z', 'e', 5993, 5635, 2587, 9469, 4203, 'l', 3859, 'A', 1501, 6983, 'r'], [7551, 5591, 'q', 'v', 'f', 7077, 'U', 'n', 'L', 2951, 's', 9233, 'O', 9115, 4149, 7797, 'P', '9129', 'm', 'g', 'i', 'G', 't', 'V', 'y', 'n', '4001', '5015', 'v', '1407', 'C', '6417', 'X', 'd', '6717', 'm', 'd', 'i', '15', '4647', 'b', 'A', 'Q', 3651, 'o']