In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7573, 9571, 9283, 'B', 'x', 'R', 9719, 331, 'W', 'D', 'O', 'W', '9859', 'M', 'I', 'H', 'm', 'K', 'g', 'q', '6617', 'l', '3969', 'X', 'E', 'L', 'H', 'I', 'M', 'u', 'v', 'V', 'b', 8599, 3729, 6137, 5699, 6833, 'U', 7041, 3121, 8255, 5209, 'e', 8171, 5693, 'H', 1525], [3217, 'L', 5967, 2839, 'I', 'b', 'O', 8061, 6793, 'D', 'O', 'L', 'D', 'O', 'W', '9859', 'M', 'I', 'H', 'm', 'K', 'g', 'q', '6617', 'l', '3969', 'X', 'E', 'L', 'H', 'I', 'M', 'u', 'S', 7527, 2675, 6933, 4769, 'h', 9163, 'C', 'w', 'd', 'X', 9919]