In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9623, 'N', 'a', 'W', 'n', 'N', '4143', '9437', 'K', 'r', 'y', '4819', 'n', 'r', 'x', '4565', '6923', '15', 'h', '5623', 'K', 'd', 'E'], [3141, 'I', 'g', 'c', 8093, 6679, 4119, 6787, 8633, 'z', 'S', 2761, 'n', 441, 'K', 'd', 'n', 'N', '4143', '9437', 'K', 'r', 'y', '4819', 'n', 'r', 'x', '4565', '6923', '15', 'h', '5623', 'K', 'R', 'O', 'n', 5655, 'Z', 'r', 2265, 'H', 'a', 'b', 'N', 8423, 5603]