In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 4687, 'O', 4781, 4825, 'P', 8109, 'O', 'l', 'n', '2439', 'm', 's', 'p', 'b', '9375', 'i', '115', '9691', 'd', 'h', '723', 'y', '2637', '6325', 'W', '2403', '9897', '9867', 'V', 'i', '1521', 'E', 'U', 'k', 'F', 'a', 'y', 'X', 'A', 'N', 8651, 8165, 'z', 'M', 10023, 'h', 'K', 'O', 6017, 9469, 'A', 'g', 'E', 'K', 'u', 8617, 3473, 'X'], ['r', 'p', 5551, 7035, 4645, 1523, 'O', 'x', 't', 'J', 1579, 'V', 'b', 3821, 'G', 9837, 3877, 721, 'P', 'm', 'L', '2439', 'm', 's', 'p', 'b', '9375', 'i', '115', '9691', 'd', 'h', '723', 'y', '2637', '6325', 'W', '2403', '9897', '9867', 'V', 'i', '1521', 'E', 'U', 'k', 'F', 'a', 'y', 'X', 'u', 9911, 9865, 'G', 'O', 3753, 2685, 3921, 8101, 'l', 1807, 'R', 'f', 3703, 'T', 4287, 3423, 917, 3779]