In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8609, 4787, 8559, 2385, 311, 1079, 's', 9521, 2093, 879, 'y', 'D', 'u', 'd', 'p', 'I', '4487', 'p', '3277', '8241', '6011', 'k', 'k', 'O', '7233', 'D', '6309', 'D', 2457, 851, 6593, 'I', 3445], ['I', 'h', 'b', 'J', 'E', 'c', 9903, 1177, 7413, 'z', 'P', 'd', 'p', 'I', '4487', 'p', '3277', '8241', '6011', 'k', 'k', 'O', '7233', 'D', '6309', 's', 'O', 'y', 8519, 2145, 'l', 191, 'R', 6985, 2431, 'r']