In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2847, 'F', 'X', 'r', 'b', 7949, 'D', 'N', 7351, 9281, 6459, 1259, 'n', 'J', 7591, 2211, 'F', 'S', 4993, 2859, 'H', 'G', '8091', 'q', 'I', 'g', 'y', '601', 'z', 'H', 'j', 'f', '765', '4123', '483', '885', '9119', 'Y', '823', '8477', 'd', 'j', '8535', '7823', 'a', '8275', 'Q', '4937', 'R', '8343', 'V', 1691, 8981, 5507, 9611, 'g', 'F', 'g', 'N', 'k'], [2443, 'H', 31, 'Q', 'l', 'h', 9763, 'y', 'v', 4593, 3593, 747, 'I', 'x', 9027, '8091', 'q', 'I', 'g', 'y', '601', 'z', 'H', 'j', 'f', '765', '4123', '483', '885', '9119', 'Y', '823', '8477', 'd', 'j', '8535', '7823', 'a', '8275', 'Q', '4937', 'R', '8343', 'g', 4379]