In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['Q', 4687, 'x', 'q', 'N', 'I', 'j', 3503, 'd', '4075', 'l', '7421', 'T', 'D', 'T', '5513', 'K', '6739', 'A', 5243, 4127], [1975, 's', 9611, 'z', 5635, '4075', 'l', '7421', 'T', 'D', 'T', '5513', 'K', '6739', 'f', 9053, 4921]