In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3083, 'U', '3609', 'y', 'U', '4891', '3069', '1645', 'r', 2357, 3627, 3581, 9975, 'Z'], [111, 979, '3609', 'y', 'U', '4891', '3069', '1645', 'd', 2699]