In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 'Y', 9177, 6381, 'y', 'I', '4461', '2545', 'U', 'i', 'F', '9791', 'V', '573', 'V', 'l', 'i', 'q', 'b', 9595, 'b', 8473], ['f', 6777, 'y', 'I', '4461', '2545', 'U', 'i', 'F', '9791', 'V', '573', 'V', 'l', 'i', 'e', 2029, 2959, 'D', 4657, 'Z', 6151, 'Y', 'z', 'O', 5909, 'i']