In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4991, 'o', 'M', 'G', 5079, '8381', 'K', 'b', 'R', '693', 'K', 'N', 413], [9521, 4249, 'Y', 4685, 'E', 'w', '8381', 'K', 'b', 'R', '693', 'K', 'O', 8071, 'U', 4585]