In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.

Example input: [5797, 8817, '8297', 'b', 'U', 'b'], [5843, 8809, '8297', 'b', 'W', 'C']
Example output: 8297, b
Example explanation: Here, '8297, b' is the longest common subsequence in both the input lists [5797, 8817, '8297', 'b', 'U', 'b'] and [5843, 8809, '8297', 'b', 'W', 'C'].
Q: ['v', 9571, 'F', '3503', '5505', '2109', 'X', 'c', 'z', 'h'], ['a', 'S', 3869, 'F', '3503', '5505', '2109', 'u', 'D', 9369, 'M']
A:
F, 3503, 5505, 2109