In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 4481, 2835, 9089, 8831, 551, 6945, 769, '8767', 'I', '2897', '6679', '1997', '285', '8451', 'z', 'G', 'y', 'f', 'F', 's', 6123, 9577], [8959, 967, 't', 'U', 'R', 8383, 4365, 'V', '8767', 'I', '2897', '6679', '1997', '285', '8451', 'z', 'G', 'y', 'l', 'G', 'D', 'Z', 2997, 'Y', 4973, 3375, 'F', 'p']