In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['c', 2031, 9605, 'u', 'P', 'y', 9489, 8761, 2867, 'u', 'F', '5713', 'b', '8249', '3463', '5619', 'q', 'A', '4039', 'l', '4223', 'b', 'H', 's', '2563', '5241', 'A', 'U', '3949', '6659', 's', 'O', 'C', '7521', 'n', 'T', 977, 3785, 'A', 3089, 'W', 'B', 'N', 'd', 'd', 'O', 6449, 'F', 9553, 't'], [7553, 9427, 65, '5713', 'b', '8249', '3463', '5619', 'q', 'A', '4039', 'l', '4223', 'b', 'H', 's', '2563', '5241', 'A', 'U', '3949', '6659', 's', 'O', 'C', '7521', 'd', 207, 'd', 'c', 4365, 'z', 'C', 'F', 'Z', 'a', 7515]