In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6181, 5263, 'd', 'W', 6805, 5601, '7261', '197', '6727', '767', '8867', 'c', 'j', 'W', '4107', 'J', 'W', 3075, 6463], ['u', 'z', 'n', 'W', 1609, '7261', '197', '6727', '767', '8867', 'c', 'j', 'W', '4107', 'a', 4409]