In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['s', 5277, 'k', 'f', 6517, 3589, 7487, 3475, '8733', '1043', 'T', '1609', '4971', '6221', '4667', 'f', '4515', 'f', 'N', 'V', '9383', 'l', 'Y', 'H', 'w', 7371, 'W', 'g', 'D', 'l', 'l'], [6687, 1259, 8063, 6495, 5347, 1205, 7631, 2075, 3139, 1951, 4653, '8733', '1043', 'T', '1609', '4971', '6221', '4667', 'f', '4515', 'f', 'N', 'V', '9383', 'l', 'o', 985, 'e', 'W', 'U', 4361, 5669, 'B']