In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1131, 4943, '199', '9459', '7219', '429', 'L', 'v', 2839, 8523], ['j', 2923, 675, 'X', '199', '9459', '7219', '429', 'L', 'u', 9367]