In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2683, 'k', 9449, 2025, 5079, 'w', '4791', 'Y', '9359', 'n', '4441', 'u', 'Z', 3223, 'o', 't', 861], ['g', 4447, 49, 'L', 3141, '4791', 'Y', '9359', 'n', '4441', 'u', 'C', 5651, 1393, 'Q', 217]