In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['o', 2615, 3907, 4759, 543, 'p', 'E', '9703', 'H', 'z', '299', '9927', 'o', '6071', 'O', 6733, 'z', 'q', 5121, 6445, 'm', 'O', 1303], ['n', 5401, 'U', 9485, 9231, 'p', 'E', '9703', 'H', 'z', '299', '9927', 'o', '6071', 'i', 'D', 5221, 'U', 'x', 9207, 727, 3031]