In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['s', 6841, 5081, 't', 'W', 'S', 3447, 6035, 'l', 'M', '2245', 'C', 's', '2959', '3965', '6725', '5003', '973', '8731', 'i', 'W', '877', '9683', '3371', 'c', 'E', 't', 7337, 8557, 'O', 'F', 'x', 'W', 'g', 'C', 'x', 2089], ['a', 'H', 5691, 'x', 5359, 7485, 'P', 'n', 'r', 'P', 'o', 'g', '2245', 'C', 's', '2959', '3965', '6725', '5003', '973', '8731', 'i', 'W', '877', '9683', '3371', 'c', 'Z', 'x', 'Z', 'L', 'K', 1219, 'd', 'O', 'h']