In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6469, 1515, 6795, 'C', 'G', 8773, 1907, 'h', '8817', '5679', 'P', '3147', '4327', 'o', '5555', 'x', '4209', 'x', 'Y', '6951', '4745', '5057', 'N', 7047, 5779, 8997, 2453, 'T', 'o', 'e', 203, 8723, 'i'], ['K', 'A', 4349, 'p', 'g', 5549, 'h', '8817', '5679', 'P', '3147', '4327', 'o', '5555', 'x', '4209', 'x', 'Y', '6951', '4745', '5057', 'k', 2817, 'C', 8047, 'E', 6803, 'q', 'e', 'd', 'C', 'u', 1573, 'l', 'L', 1653]