In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[5199, 8133, '4683', 'U', '7603', '8689', 'S', 'y', 'h'], ['M', 3937, 'Y', 'O', '4683', 'U', '7603', '8689', 'b', 'b']