In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7221, 4905, 'o', 'Q', 'j', '961', 'Q', 'i', 'u', '1003', 'E', 6513, 'R', 'K'], ['Q', 7229, '961', 'Q', 'i', 'u', '1003', 'y', 983, 'K', 'Y', 8815]