In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['k', 5727, 5347, 'l', 'h', 'R', 't', '6377', '3287', 'i', 'X', '3717', '1449', '9403', 'O', '7257', '711', '2641', '8029', '4563', '2811', '2515', 'H', 'G', 'C'], [4865, 9899, 9357, 'Z', 4453, 'p', 4597, 'z', 'A', 't', '6377', '3287', 'i', 'X', '3717', '1449', '9403', 'O', '7257', '711', '2641', '8029', '4563', '2811', '2515', 'H', 'E', 4591, 2215, 4035, 'M', 'x', 'f', 'a', 'b', 'O', 'j']