In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2721, 2251, 261, 8247, 't', 's', '7037', '8387', '9951', '8229', '9', 'm', '535', '2671', '3077', 'd', '9775', 'T', '4381', '8703', 'X', '8237', '655', '5135', '7789', '6271', 'F', '979', 'd', 'd', 'D', 'N', 'U', 2995, 1795, 'T', 8837, 337, 'j', 'y', 5287, 6215, 'b', 'g'], [9551, 811, 'v', 7719, 8775, 3007, 'e', 'w', 5789, 'c', 1063, 5021, 5399, 't', 's', '7037', '8387', '9951', '8229', '9', 'm', '535', '2671', '3077', 'd', '9775', 'T', '4381', '8703', 'X', '8237', '655', '5135', '7789', '6271', 'F', '979', 'd', 'd', 'D', 'N', 'j', 'C', 7525, 'h', 'y', 'O', 1921, 'O', 7731, 1599, 7461, 6963, 7475, 5225, 6971, 'N']