In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['H', 'J', 'N', '6103', 'G', '4831', '959', '9613', '4825', 'o', 'Y', 6909, 9691], ['w', 7137, 't', 8013, '6103', 'G', '4831', '959', '9613', '4825', 'G', 'X', 6883, 5761]