In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[201, 'O', 'd', 'w', 'P', 'c', 'D', 'd', 'f', 'N', 7515], ['f', 6135, 's', 'P', 'c', 'D', 'd', 'q', 7909, 9923, 4165]