In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['P', 'h', 2881, 679, 3521, 'K', 'X', 991, 1201, 'Z', 'l', 'Q', 'o', 'H', '8693', '2401', '9025', '2259', '2295', 'O', '3501', 'Y', 'J', '5751', 'P', 'e', 'W', 5121, 379, 'u', 9181, 'M', 8489, 9579, 7625, 1691, 6793, 4723], [2491, 9207, 'l', 'Q', 'o', 'H', '8693', '2401', '9025', '2259', '2295', 'O', '3501', 'Y', 'J', '5751', 'F', 'l', 'x', 'e', 2493, 'x', 1629]