In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2265, 'C', 4291, 5615, 2313, 'X', 'u', 'a', '5951', '1487', '5801', 'b', '7101', 'u', 'z', 'I', 7685, 995, 5067, 'I'], [6137, 929, 'X', 'u', 'a', '5951', '1487', '5801', 'b', '7101', 'u', 'z', 'f', 6799, 2469, 'm', 'L']