In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6879, 'O', '9227', '2005', '9437', 'f', '5995', 'l', 'J', 'a', 'l', 'R', 'Q', '6999', 'u', '9973', 's', 'e', 'C', 'x', '9921', '5263', 'T', '8895', 'V', 'L', 'r', 8045, 'A', 'i', 1073, 8621], ['D', 5413, 4083, 8931, '9227', '2005', '9437', 'f', '5995', 'l', 'J', 'a', 'l', 'R', 'Q', '6999', 'u', '9973', 's', 'e', 'C', 'x', '9921', '5263', 'T', '8895', 'V', 'L', 'x', 9679, 6951, 7973, 4317, 'x', 'x', 'S', 475, 2853, 'k', 'l', 'y', 'm', 'r', 'N', 'w', 5539]