In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4821, 1915, 'g', 7517, 3273, '211', '4575', 'N', 'A', '8657', '5379', 'H', '8043', '601', 'J', '7485', '8611', '5753', 'G', 'N', 2253, 'h', 'B', 6899], ['d', 639, 'M', 'V', 'C', 689, '211', '4575', 'N', 'A', '8657', '5379', 'H', '8043', '601', 'J', '7485', '8611', '5753', 'A', 8283]