In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6903, 5921, 'h', '7381', 'u', '3965', '7267', 'r', 'm', 'w', '1595', 'h', 7443, 'f', 5765], [3045, 'L', 'N', 'r', 'c', 'h', '7381', 'u', '3965', '7267', 'r', 'm', 'w', '1595', 'u', 1581, 'n', 9691, 'c']