In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6121, 6615, 1319, 'J', 7411, 859, 4889, 1081, 8377, 8209, 'z', 'J', '7719', 'a', '2887', 's', 'T', '10029', '9545', 'd', 'A', '619', 'Y', '8037', '4031', 't', 'c', 8589, 7743, 'Q', 's', 5645], ['G', 8163, 'X', '7719', 'a', '2887', 's', 'T', '10029', '9545', 'd', 'A', '619', 'Y', '8037', '4031', 'S', 't', 'L', 4937, 'e', 'a']