In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3707, 5669, 'J', 2067, '2987', 'q', '7203', '5179', 't', 'y', '8535', '8649', 'a', '2209', '6353', 'B', '5669', 'f', '3875', 'M', 'y', 1429, 9309, 'g', 'd', 'x', 'o', 'l', 'q', 2479, 8025, 6053, 'm', 2915], [233, 7863, 'o', 'E', 8491, 8143, 5437, 3101, 'y', 8067, 6913, '2987', 'q', '7203', '5179', 't', 'y', '8535', '8649', 'a', '2209', '6353', 'B', '5669', 'f', '3875', 'R', 6925]