In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2221, 'D', 'L', 'O', 'z', '7865', 'x', '4289', '5847', '5547', '1069', 'I', 'S', '9457', 'p', 'b', 'C', 3911, 6129, 2545, 't', 'B', 'u', 6525, 's', 'Q', 6249], ['L', 'A', 'z', '7865', 'x', '4289', '5847', '5547', '1069', 'I', 'S', '9457', 'p', 'b', 'q', 1761, 'f', 45, 'F']