In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2537, 6359, 'W', 't', 6083, 'v', 'O', 'p', '6037', '9455', 'u', 'r', 6711, 'E', 8823, 2523, 7535], [8157, 7759, 'B', 'G', 'v', 'O', 'p', '6037', '9455', 'u', 'N', 'u', 'k']