In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7989, 3159, 4805, 7913, 'u', 'k', 7703, 'l', 4829, 'a', 'n', 'K', 'I', 'P', 'w', '5065', 'w', 'F', '1399', 'Y', '9137', 'R', 'A', '6545', '5011', '1685', 'b', 'E', 'T', 'f', 'A', 'c', 'Q', 'i', 'N', 'H', 'P', 'C', 579, 9867, 'Q', 8907, 7523, 4057], ['I', 9005, 2393, 't', 'w', '5065', 'w', 'F', '1399', 'Y', '9137', 'R', 'A', '6545', '5011', '1685', 'b', 'E', 'T', 'P', 5371, 'O', 7707, 83, 7283, 7903]