In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2673, 'H', 7527, 801, 's', 't', 'v', 4159, '2219', 'G', 'a', '3813', '4547', '8699', 'F', 'J', 'd', '6311', 'T', 'V', 'o', 'w', 'M', 'L', '2503', 'B', 'y', '9651', 'R', '7151', '3999', 's', 7423, 8047, 'G'], ['f', 721, '2219', 'G', 'a', '3813', '4547', '8699', 'F', 'J', 'd', '6311', 'T', 'V', 'o', 'w', 'M', 'L', '2503', 'B', 'y', '9651', 'R', '7151', '3999', 'V', 1347, 3927]