In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2101, 3553, 3707, 'W', 9069, 'z', 'e', 'k', 'c', 2181, 4849, 'R', '9469', 'm', 'x', '2807', 'i', 'E', '679', 'w', 'c', '7763', '3081', 'v', 'O', '8057', '7019', '2803', 'r', '8069', 'Q', 'r', 'K', 7367, 4671, 'G', 'F', 'n', 9369, 4931, 'F', 9547, 'G', 'A', 1731, 1097, 'C', 8293, 9385, 9991, 'r'], ['k', 'V', 4927, 'i', 6011, 6275, 'y', 8833, 'r', 'l', 'R', '9469', 'm', 'x', '2807', 'i', 'E', '679', 'w', 'c', '7763', '3081', 'v', 'O', '8057', '7019', '2803', 'r', '8069', 'Q', 'r', 'l', 5181, 'w', 'o', 4073, 'A', 'x', 'q', 's', 9267, 6639, 1605, 'Y', 9349, 1727]