In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7731, 1745, 7103, 1597, 'k', 9279, 'k', 'N', 7343, 5795, 1191, 4429, 's', 'm', '4807', '8439', 'G', 'D', '2043', '9065', '3609', 'H', '5133', 'I', 'k', 'g', '6841', 'h', 2217, 9265, 'w', 4459, 855, 'v'], ['b', 2177, 'X', 2393, 'f', 'r', 's', 'm', '4807', '8439', 'G', 'D', '2043', '9065', '3609', 'H', '5133', 'I', 'k', 'g', '6841', 'j', 's', 'c', 8411, 4763, 6865, 1761, 'p', 6833, 1403, 4517, 6669]