In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4539, 'q', 543, 2831, 2489, 'l', 3021, 'H', 6219, 'e', 5685, 'V', '2543', 'V', 'M', 'x', '4091', '2707', '5555', 'a', 'F', 'L', '2405', '1107', 'F', '4021', '9615', '5349', '3323', 'S', 'B', 'd', 'B', 1989, 'N', 6791], [1213, 4639, 5759, 1487, 3853, 'S', 'l', 225, 't', 3391, 7335, 'X', 4085, 'n', 'H', 5727, 'A', 'o', 'Y', '2543', 'V', 'M', 'x', '4091', '2707', '5555', 'a', 'F', 'L', '2405', '1107', 'F', '4021', '9615', '5349', '3323', 'S', 'B', 'd', 'L', 'c']