In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6249, 'G', 'Q', 9313, 'j', 'L', 'd', 'G', 'x', 5631, 'A', 'y', 'S', 7247, 443, '3323', '609', 'B', 'B', '9955', '1319', '1271', '635', 'C', 'F', 'a', '6027', '449', 'M', '7827', 'z', '7387', '1879', '8455', 'e', 'U', '2929', 'z', 'd', 'U', 'S', 'U', '6523', '87', '3849', 'G', 1171, 'j', 7931], ['P', 'l', 8473, 2357, 6281, 7339, 1749, 8975, 4291, 'E', 4091, 't', 8687, 'V', 1065, 3089, 2745, 'C', 'b', 'T', 5165, 'Z', '3323', '609', 'B', 'B', '9955', '1319', '1271', '635', 'C', 'F', 'a', '6027', '449', 'M', '7827', 'z', '7387', '1879', '8455', 'e', 'U', '2929', 'z', 'd', 'U', 'S', 'U', '6523', '87', '3849', 'x', 'Y', 5261, 1167, 'H', 'X', 'K', 'R', 'o', 'k', 't', 8125, 'z', 'A', 's', 'i', 'n', 'k']