In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6469, 'P', 'x', 'V', 1189, 5649, 'x', 'Y', '7287', 'R', '5637', '5115', '6931', 'k', 'L', '1021', '1949', '5105', 'K', '331', 'c', '5071', 'B', 'T', '1281', 'b', '8463', '2295', '9381', 'W', '3647', 'A', '10027', '6011', 'F', 'u', 3457], ['E', 'H', 'o', 6443, 'C', 4645, 'd', 7257, 5513, 5259, 'w', 8833, 'r', 4407, 7317, '7287', 'R', '5637', '5115', '6931', 'k', 'L', '1021', '1949', '5105', 'K', '331', 'c', '5071', 'B', 'T', '1281', 'b', '8463', '2295', '9381', 'W', '3647', 'A', '10027', '6011', 'q', 3521, 6587, 'c', 5861, 3259, 2669, 6367, 'o', 5445, 1825, 9319, 'd', 'd', 'U', 8013, 'x', 9939, 'A', 'u', 'd', 2693, 9143, 1369, 27, 'C']