In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1387, 1733, 'n', 'F', 1189, 7797, 3145, 381, 's', 'K', 3179, 'H', 'f', '2557', '5871', 'J', 'e', '3929', '1589', '7019', '4689', '2289', '2037', '95', '5787', '1237', '6941', 'f', 'E', 2221, 'W', 'C', 9353, 9443, 'T', 'I', 'g', 'Y'], ['h', 2533, 551, 6235, 9955, 4049, 'G', 'E', 7957, 211, 9951, 9583, 'H', 'f', '2557', '5871', 'J', 'e', '3929', '1589', '7019', '4689', '2289', '2037', '95', '5787', '1237', '6941', 'f', 't', 'H', 5621]