In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4109, 2549, 'i', 'N', 5859, '2257', 'N', '5749', '5011', '1157', 'r', 'y', 'K', '3801', 't', '9435', 'u', 'A', 'y', 'l', '8983', '4173', '213', 'A', 'g', 'm', 6639, 9115, 6285, 4815, 3179, 1025, 'T', 6353, 3929, 'E', 'w', 1057, 4043, 'K', 'V'], [6671, 'C', 9715, 'l', 6383, 'f', 'B', 'R', 'J', 4879, 'e', 'j', 721, '2257', 'N', '5749', '5011', '1157', 'r', 'y', 'K', '3801', 't', '9435', 'u', 'A', 'y', 'l', '8983', '4173', '213', 'A', 'V', 7453, 's', 'b', 7907, 6457, 'f', 'H', 2109, 4293, 7139, 'T', 'Z', 6293]