In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7963, 'h', 275, 6023, '1959', 'I', '2997', '217', '1609', 'm', 'b', 'e'], ['V', 9623, '1959', 'I', '2997', '217', '1609', 'R', 7429, 'u']