In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6023, 'g', 5433, 'x', 4031, 'N', 2963, 8965, 2537, 'L', 7953, 'i', 145, 'a', 913, 8469, 5567, 'a', 8823, 5947, 'r', 'U', 'Z', '9807', 's', '4455', '7907', '6503', '8675', 'T', 'G', '4721', 'H', 'd', '3609', 'q', '2533', 'C', '767', '3903', '4341', 'x', 'm', '6175', 'S', 'F', 'Q', 'W', 'm', '693', 'O', 'N', 7779, 1977, 255, 'I', 'U', 1285, 'w', 'B', 'e', 'v', 'y', 'r', 1337, 3507, 'E', 3427, 'M', 2303, 6203, 'C', 'm', 6751, 'J', 'B', 'F', 'V', 'S'], ['B', 'x', 'P', 'x', 'j', 's', 8455, 'r', 7503, 499, 5843, 'c', 'n', 'a', 'U', 'Z', '9807', 's', '4455', '7907', '6503', '8675', 'T', 'G', '4721', 'H', 'd', '3609', 'q', '2533', 'C', '767', '3903', '4341', 'x', 'm', '6175', 'S', 'F', 'Q', 'W', 'm', '693', 'm', 's', 's', 3507, 8647, 1531, 2701, 4659, 'q', 5345, 8123, 'J', 9209, 2311, 'T', 3123, 'X', 'c', 9857, 'K', 1899, 53, 3479, 8177, 'D', 'm']