In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2315, 'y', 'Z', '1825', '8235', '785', '9287', 'k', 1605], [7655, 3263, 9657, '1825', '8235', '785', '9287', 'N', 3899, 'j', 't']