In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9133, 1343, 5759, 'J', 4359, 6129, 'b', 'n', 'v', 3591, 'Y', '4713', '3551', '7489', '2237', 'P', '3643', '5233', '9465', '2967', 'R', '767', 'o', 'd', 7785, 't', 3707, 8293, 'x', 2171, 'a'], ['x', 6593, 219, 'M', 3029, 9875, 969, 'l', 'F', 'C', 559, '4713', '3551', '7489', '2237', 'P', '3643', '5233', '9465', '2967', 'R', '767', 'I', 1887, 5177, 'f', 5605]