In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['L', 9623, 5997, 3117, 'E', '3879', '3015', '7549', '3515', 'B', '7983', 'S', '647', '4799', 'e', 'b', 'f', '2841', 'a', 'g', '9993', '6955', 'S', '9361', 'O', 6159, 8047, 'A', 'k', 2903, 9269, 4717, 'b', 7295], [3469, 6715, 'W', 8963, 3391, 6951, 'Z', 2615, 'I', 4259, 'e', 'f', 'g', 'E', '3879', '3015', '7549', '3515', 'B', '7983', 'S', '647', '4799', 'e', 'b', 'f', '2841', 'a', 'g', '9993', '6955', 'S', '9361', 'y', 'q', 'P', 9015, 'N', 2987, 'J', 'h', 'S', 9949, 'a', 'H', 'A', 1917, 'z', 'z', 1677, 2167, 4205]