In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['s', 'H', 1583, 'C', 'I', '5793', '8843', '4553', '5127', '1559', '6219', 'A', '3193', 'E', '873', 'G', 'y', 'T', 1653, 'N', 2135, 9979, 'i', 'H'], ['C', 'm', 's', 't', 1691, 3153, 7863, 'G', 9031, 'C', 'I', '5793', '8843', '4553', '5127', '1559', '6219', 'A', '3193', 'E', '873', 'G', 'W', 45, 5467, 's', 5231, 6479, 3957, 'r', 1735, 7797, 4175, 'x']