In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4025, 'I', 'D', 3461, 2987, 1457, 'K', 'A', 35, 4001, 'y', 's', 2085, 4543, 'Y', 7191, 'C', 'Z', '6497', 'Q', 'i', 'F', 'D', 'Y', 'o', '4127', 'C', '755', '5085', 'J', 'W', 'x', 'R', '4667', 's', 'g', 'x', '7723', '2447', 'B', 559, 'f', 'A', 4755, 1411, 'z', 'U', 7349, 2411, 'd', 6983, 'z', 1115, 'b'], [8827, 4849, 5965, 2487, 'u', 2341, 1235, 8697, 1211, 'K', 'S', 'y', 5933, 7, 3015, 'G', 2201, 7425, 'Z', '6497', 'Q', 'i', 'F', 'D', 'Y', 'o', '4127', 'C', '755', '5085', 'J', 'W', 'x', 'R', '4667', 's', 'g', 'x', '7723', '2447', 'v', 687, 5855, 'f', 'Q', 9801, 7351, 9109, 873, 'a']