In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['R', 'd', 'i', 3673, 'n', 4549, 'z', 'W', 'u', 'U', 3323, '3219', '7901', 'I', 'J', '4773', '8455', 'Y', 'C', '8613', '9949', 'F', 'y', '3553', '5723', 'G', 'E', 't', 'T', '7421', '7725', 'Q', 'm', 3453, 'G', 'M', 'I', 6917, 'e', 'r', 'R', 'Z', 'c', 'e'], ['L', 'x', 'U', 10021, 'Q', 6935, 'C', 4839, 'B', 2565, 3653, 4473, '3219', '7901', 'I', 'J', '4773', '8455', 'Y', 'C', '8613', '9949', 'F', 'y', '3553', '5723', 'G', 'E', 't', 'T', '7421', '7725', 'Q', 'u', 'y', 'h', 'O', 'b', 'H', 'b', 9243, 'Q']