In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7455, 'k', 'f', 'K', 8745, 't', 3811, 'D', '2615', '8107', '9791', 'Y', '8581', '2179', '4893', 'N', 'W', '7267', 'H', 'S', '8609', '5019', 'G', '1257', '1877', 'o', '2857', 'K', 'n', 'U', 'k', 'D', 'T', 3087, 'p', 1549, 'g', 'X', 7469, 4501, 'F', 'Z', 7729, 4281, 'v'], ['W', 'P', 'n', 'D', 'C', 'x', 'x', 'h', 'm', '2615', '8107', '9791', 'Y', '8581', '2179', '4893', 'N', 'W', '7267', 'H', 'S', '8609', '5019', 'G', '1257', '1877', 'o', '2857', 'K', 'n', 'U', 'k', 'T', 9523, 'N', 'Z', 'a', 'D', 'n', 8285, 'h', 4101, 1593, 1611, 7905, 'z', 'W', 4583, 8701, 6479, 'B', 'f', 'q', 'R', 'w']