In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7909, 'Z', 'y', 'K', 'W', 'h', '135', 'A', '1431', 'F', 'v', 'b', 'i', 'g'], [6963, 'm', 4847, 'R', 8383, 'X', 7175, 'y', 'K', 'W', 'h', '135', 'A', '1431', 'F', 'v', 'b', 'd', 'q']