In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1883, 3255, 3429, 'H', 3091, 285, 'q', 8963, 'A', 'K', '57', 'K', 'K', '7755', 'y', '8063', 'C', '4847', '3871', '9941', '3599', 'E', 's', 'q', 'f', 'T', 8293, 7123, 4157, 6217], [7639, 3529, 8941, 9305, 1083, '57', 'K', 'K', '7755', 'y', '8063', 'C', '4847', '3871', '9941', '3599', 'k', 'O', 'J', 4299, 'M', 'l', 'T']