In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1615, 9479, 4823, 'n', 'J', 3077, 'Z', '8715', '4643', 'P', 'd', 'H', '3453', 'b', '763', 'T', 'p', 'n', 'z', 'w', '8743', 'E', 'Z', '7055', '6427', '7385', 'L', '9815', '5063', '6597', '2481', 'o', 'a'], ['Z', 'Y', 2717, 7873, 3945, 'e', 2671, 5017, 'V', 'x', 'x', 'C', 'R', 2435, 4083, 1227, 'n', 2727, 'Z', 'Z', '8715', '4643', 'P', 'd', 'H', '3453', 'b', '763', 'T', 'p', 'n', 'z', 'w', '8743', 'E', 'Z', '7055', '6427', '7385', 'L', '9815', '5063', '6597', '2481', 'G', 'm', 2809, 'j', 'x', 'n', 'e', 'X', 'E', 7331, 'C', 1837, 'c', 'z', 4017, 41, 7273, 2833, 'P', 7185, 2687, 9189, 8841, 'E']