In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6819, 6049, 5623, 1125, 'r', 2775, 'C', 'g', '4341', 'B', '4955', '5971', 'h', 807, 9433, 7611], ['v', 5519, 2173, 2779, 'C', 'g', '4341', 'B', '4955', '5971', 'N', 'z', 'L']