In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['r', 'o', 'A', 1521, 'r', 'B', 6539, 'O', 'C', 'P', 2795, 4979, 'a', 9681, 'F', 'v', 'K', 'A', 'i', 'c', 'D', 2549, 'X', 'c', 8839, 'q', '3423', '659', '2739', '5775', '6819', 'g', '3715', 'M', 'E', 'x', '5247', '5149', '9027', 'r', '1069', '7379', '1931', 'S', 'a', 'c', '8263', '9989', '3613', '7743', '5243', '8085', 'm', 'T', 7069, 'e', 5523, 'Y', 'T', 'o', 9493, 'U', 8943, 3543, 'S'], ['a', 'k', 673, 'B', 'H', 'N', 277, 4799, 'e', 6671, 'x', 'D', 'x', 7067, 'q', 1131, 'G', 'q', '3423', '659', '2739', '5775', '6819', 'g', '3715', 'M', 'E', 'x', '5247', '5149', '9027', 'r', '1069', '7379', '1931', 'S', 'a', 'c', '8263', '9989', '3613', '7743', '5243', '8085', 'j', 'T', 'R', 4713, 2529, 9625, 'y', 7651, 8297, 'R', 'R', 'K', 1731, 1553, 'w', 4243, 9285, 3965, 5119, 'I', 'a', 2079, 'q', 441, 't']