In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9271, 8949, 'Y', 'v', 'K', '9001', '5015', 'A', 'W', 'N', '91', 'e', 'r', '4609', 'S', 'p', '7221', 'N', 's', '2759', 'L', '4019', '805', 'N', 'v', 'p', 'g', 'R', 3449, 'O', 's', 'D', 7401, 'v'], [8153, 3251, 6321, 'v', 5139, 'H', 'O', 8569, 6697, 5367, 4877, 'Z', 'O', 1369, '9001', '5015', 'A', 'W', 'N', '91', 'e', 'r', '4609', 'S', 'p', '7221', 'N', 's', '2759', 'L', '4019', '805', 'N', 'v', 'p', 'A', 'L', 'X', 'P', 'N', 'y', 'k', 'u', 'x', 'z', 'G', 3415, 6575, 2887, 'r', 3811, 6045, 9507, 'D', 2293, 'T']