In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 981, 'O', 'x', 2719, 'Z', 'O', '6849', 'l', '9437', '3159', '5229', 'U', '6267', 'a', 'P', '2041', '2127', '5623', '9255', 'b', '9249', '2513', '139', '5149', '4029', 'C', 'b', '4903', 'G', 537, 4665, 'y', 'E', 'v', 1647, 695, 'l', 'e', 'g', 'x'], [7383, 2757, 8699, 8221, 4173, 'h', 6835, 1109, 2953, 'A', 9277, 'F', 4405, 'T', 5711, '6849', 'l', '9437', '3159', '5229', 'U', '6267', 'a', 'P', '2041', '2127', '5623', '9255', 'b', '9249', '2513', '139', '5149', '4029', 'C', 'b', '4903', 'F', 2833, 3451, 'K', 'z', 'L', 'b', 3273, 4653, 4489, 1367, 'w', 8415, 2389, 7041, 7929, 's']