In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7575, 5753, 'd', 'b', '6795', '6893', 'r', 'k', '4941', 'n', 9771, 'F', 'C', 649], ['N', 'C', 'P', 1679, '6795', '6893', 'r', 'k', '4941', 'V', 'v', 'Q', 'N']