In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['k', 8059, 6387, 'H', 8211, 'B', 'H', 5425, 'K', 'u', 'k', '459', 'B', 'H', '2409', '3787', 'W', 'q', '7221', 'm', '1879', 't', 'i', '9751', '9997', 'F', 's', 'd', '8241', 'O', '5125', 'u', 'S', '7855', '1343', '2531', 'W', 'F', 'r', 'Y', 'n', 4749], ['L', 1327, 'i', 'A', 891, 9533, 5597, 2649, 'V', 'C', 9587, 'k', 8839, 'z', '459', 'B', 'H', '2409', '3787', 'W', 'q', '7221', 'm', '1879', 't', 'i', '9751', '9997', 'F', 's', 'd', '8241', 'O', '5125', 'u', 'S', '7855', '1343', '2531', 'W', 'F', 'r', 'R', 'z', 7315, 9317, 'x', 7349, 1723, 'b', 2455, 'o', 'l', 699, 't', 1341, 'h', 'b', 'B', 5797, 7461, 5031, 1419, 3055, 1501, 7933, 'I', 'e', 'F', 'C']