In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4731, 'z', 8923, 1325, 'P', 8435, 'u', 'B', 'N', 8191, 'O', '3019', '4077', 'w', 'W', 'x', 'z', '2233', '6509', 'N', '3069', '5471', 'K', 'x', 'q', '979', 'M', 'O', 'H', 9453], [4977, 'E', 4865, 'O', '3019', '4077', 'w', 'W', 'x', 'z', '2233', '6509', 'N', '3069', '5471', 'K', 'x', 'q', '979', 'M', 'R', 'T', 7065]