In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8321, 2445, 'N', 6867, '983', 'i', 'G', '2029', '7271', '7019', 't', 'Q', 'T', '6685', '2149', '8961', 'E', 'q', 'Q', 5467, 't', 'F', 'S', 'a', 't', 2493, 'o'], [7871, 'C', 'T', 3977, 'I', 4799, 'L', 'q', 'C', 6475, 's', 'n', '983', 'i', 'G', '2029', '7271', '7019', 't', 'Q', 'T', '6685', '2149', '8961', 'F', 8833, 1123, 't']