In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3489, 'b', 4083, 10013, '7247', 'F', '4491', '2501', 'd', 4767], ['a', 'z', 9297, '7247', 'F', '4491', '2501', 'b', 'k']