In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['P', 3983, 7291, 1209, 659, 6053, 'W', 'u', 2917, 's', 'G', 't', 'M', 'N', 'i', 7219, 'A', 3141, '7713', 'v', 'P', '823', 'n', 'm', 'd', 'Z', 'U', '3181', 'k', 'M', 'y', '9727', 'w', 'J', 'u', '4849', 'v', 'H', 'Q', 'p', 'O', 'A', 'N', 6715, 207, 7549, 311, 't', 2679, 'Z', 763, 6569], [739, 'r', 'q', 'g', 7637, 'Y', 8691, 'G', 3235, 1771, 4665, 's', 'u', 'K', 'X', 'h', 'q', 'z', '7713', 'v', 'P', '823', 'n', 'm', 'd', 'Z', 'U', '3181', 'k', 'M', 'y', '9727', 'w', 'J', 'u', '4849', 'v', 'H', 'Q', 't', 'x', 2969, 4075, 'S', 9979, 'O', 'M', 6477]