In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8473, 'Z', 9273, 949, 3763, 'Y', 'J', '6231', '1367', '1259', 'o', 'a', '3709', '4635', 'J', 3283, 'Q', 'u'], [7389, 815, 'C', 4003, 'R', 'p', 2981, '6231', '1367', '1259', 'o', 'a', '3709', '4635', 'V', 'l', 2769, 'g', 2209, 'L']