In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['K', 's', 'o', 6883, 'r', 'E', 'A', 'a', 'v', 'z', 'J', 'M', '4215', 'W', 'F', 'e', 'G', 'p', '3301', 'e', 'N', 4015, 'R', 'K', 113, 'a', 7389, 9749, 7723], ['Z', 'z', 'l', 'J', 'M', '4215', 'W', 'F', 'e', 'G', 'p', '3301', 'e', 'X', 7145, 'u', 9639, 'O', 'n', 'K', 'K', 9413]