In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['f', 9467, 'e', 'f', 4021, 9773, 8241, 4457, 7545, 'X', '2131', 'e', '2767', 'a', 'M', '8819', 'X', '9385', '9999', 'v', 'G', '8969', '6269', '5147', '8239', 'J', '1071', '1081', '6141', '7629', 'J', 'v', 'L', 3813, 'V', 'E', 'u', 1641, 145, 'F'], [8511, 'w', 't', 'J', 'a', 4573, 9085, 'U', 8331, 'J', 8791, 3709, 6181, 4675, 'j', 4849, 9669, 6357, 'q', '2131', 'e', '2767', 'a', 'M', '8819', 'X', '9385', '9999', 'v', 'G', '8969', '6269', '5147', '8239', 'J', '1071', '1081', '6141', '7629', 'J', 'O', 'R', 'W', 523, 9439]