In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 77, 7651, 4741, 'Y', '7415', 'e', 'N', 'Y', 'f', 2195, 4239, 'Q'], [9243, 1575, 8871, 'Y', '7415', 'e', 'N', 'Y', 'X', 863, 'O', 'I']