In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8891, 9883, 1799, 373, 'w', 135, 'U', 'y', 6675, 2555, 'g', '8717', '6989', 'X', '3247', '3151', 'T', 'Q', 't', '3681', '1419', '1977', '7331', '2731', 'T', 'K', '9493', 'Z', 1999, 'm', 'E', 'F', 'C', 9395, 'z'], [6421, 'T', 'h', 4047, 'T', 3549, 9447, 'w', 4153, '8717', '6989', 'X', '3247', '3151', 'T', 'Q', 't', '3681', '1419', '1977', '7331', '2731', 'T', 'K', '9493', 'R', 'r', 4211, 'z', 5739, 5521, 'W']