In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3873, 'T', 'k', 'X', 3909, 4219, 'M', 2203, 8577, 'Y', 'R', 'O', 6019, 4665, 8413, 'L', 8251, '349', 'H', '6269', 'p', '6761', '5353', '5673', 'E', 'p', '7255', '9515', 'o', 'o', 'P', '5907', 'E', 'h', '5915', 'U', 'f', 's', '3539', 'x', 'x', 'r', 'v', 'k', 'M', 'y', 'V', 'b', 'h', 7479, 'G', 'I', 1241, 7215, 'J', 5515, 1227, 'd', 5265, 'v', 'W', 'y', 9517, 'w', 2671], ['E', 1175, 7077, 5609, 6071, 1915, 485, 'v', '349', 'H', '6269', 'p', '6761', '5353', '5673', 'E', 'p', '7255', '9515', 'o', 'o', 'P', '5907', 'E', 'h', '5915', 'U', 'f', 's', '3539', 'x', 'x', 'r', 'v', 'k', 'M', 'f', 'f', 'o', 'C', 'G', 9255, 'u', 6517, 2343, 8187, 1103, 'O', 'R', 6191, 'W', 'H', 6031, 1897, 'a', 'n', 905, 783, 3775, 7615]