In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7937, 5481, 8719, 's', '3863', '123', '7799', 'y', 'n', 'v', 'e', 'L', 'x', 1073], ['R', 'F', '3863', '123', '7799', 'y', 'n', 'v', 'A', 'h', 'Y']