In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['T', 1801, 7903, 2505, 2511, 5321, 389, 3309, 911, 'L', 'y', 7469, 't', 4269, 'R', 'k', '1667', '2025', '3461', 'W', 'P', '4225', 'K', '6931', '8335', '4295', '1989', 'N', '459', '1543', 'C', 'L', 'F', '6813', 'o', 'K', 'x', 'i', 'q', 'U', 7713, 1109, 819, 4019], [9187, 5621, 'r', 10007, 625, '1667', '2025', '3461', 'W', 'P', '4225', 'K', '6931', '8335', '4295', '1989', 'N', '459', '1543', 'C', 'L', 'F', '6813', 'o', 'K', 'x', 'i', 'q', 'f', 'f', 'T']