In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6603, 6491, 6131, 8047, 5479, '1151', '7037', 'W', 'i', 's', '8165', 'Y', 'B', 'v', 9409, 'n', 'I'], [1905, 'T', '1151', '7037', 'W', 'i', 's', '8165', 'Y', 'F', 4747]