In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 2689, 'W', 721, 9443, 2383, 5771, 'u', '2141', '5415', 'a', '7501', 'q', 'O', '1413', '5243', 'v', '1997', 'q', 'u', 'I', '4929', '4387', 'j', 4435, 5807, 7935], [673, 9955, 225, 'r', 6981, 'o', 'T', '2141', '5415', 'a', '7501', 'q', 'O', '1413', '5243', 'v', '1997', 'q', 'u', 'I', '4929', '4387', 'n', 'L', 'z', 4339, 'f', 185, 5009, 'V']