In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['m', 'z', 'b', 'b', 1847, 'F', '3137', 's', '8765', '205', '7917', '8279', 'I', 'J', 'X', 'd', 7443, 5851, 'V', 'c', 3587, 211], ['m', 3273, 'X', 8829, 3475, 3445, 5543, 'F', '3137', 's', '8765', '205', '7917', '8279', 'I', 'J', 'X', 'y', 5855, 5381, 9817, 'Y', 'd']