In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1695, 't', 297, 'v', '7231', '4015', '5515', '4353', 'w', 'k', 'k', 'A', 'v'], [3619, 3091, 'v', '7231', '4015', '5515', '4353', 'j', 'O', 2769]