In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
Example: [5797, 8817, '8297', 'b', 'U', 'b'], [5843, 8809, '8297', 'b', 'W', 'C']
Example solution: 8297, b
Example explanation: Here, '8297, b' is the longest common subsequence in both the input lists [5797, 8817, '8297', 'b', 'U', 'b'] and [5843, 8809, '8297', 'b', 'W', 'C'].

Problem: [5515, 'R', 't', 6907, 2977, 'g', 8269, 'n', 9793, 371, 4557, 'B', 'U', 4883, 'z', 9443, 1565, 'P', '3131', '361', '2573', '3925', 'l', '5599', 'y', 't', '2095', 'L', 'i', 'b', 'D', 'E', '4659', 'l', 'R', 'p', 639, 8761, 4703, 8939, 9691, 6945, 7765, 'O', 4769, 9759, 'X', 'u', 'A', 'e'], [9641, 'u', 7747, 'u', 'j', 6439, 'V', 'P', '3131', '361', '2573', '3925', 'l', '5599', 'y', 't', '2095', 'L', 'i', 'b', 'D', 'E', '4659', 'l', 'R', 'x', 's']
Solution: P, 3131, 361, 2573, 3925, l, 5599, y, t, 2095, L, i, b, D, E, 4659, l, R