In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4901, 2205, 'v', 'Z', 4519, 'C', 'I', 9483, 3721, 'C', 'e', '3445', 'W', 'z', '6939', 'F', '673', '9329', 'z', '8515', 'j', 'F', '8497', 'B', '3337', '1157', 'k', '375', 'z', 'j', 'E', 'F', 'h', 'e', 'O', 'L', 4957, 'r', 5869, 'n', 51, 5581, 5091, 'H', 'c', 3173, 8065, 'c', 'M', 'J', 'b', 'm', 'M', 8743], [589, 7823, 'K', 'e', '3445', 'W', 'z', '6939', 'F', '673', '9329', 'z', '8515', 'j', 'F', '8497', 'B', '3337', '1157', 'k', '375', 'z', 'j', 'E', 'F', 'h', 'h', 7861, 't', 'U', 'b', 4839, 2903]