In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9009, 't', 'C', 8963, 989, 965, '2865', 'F', '7921', '4991', '4853', 'C', '9315', 'f', 'N', '5815', '6845', 'W', '925', '1197', 'Z', 7075, 'Y', 4225, 1277, 'N', 3121, 5283, 'U', 'I', 'Y', 3253, 'I'], ['e', 'n', 'P', 'M', 'L', '2865', 'F', '7921', '4991', '4853', 'C', '9315', 'f', 'N', '5815', '6845', 'W', '925', '1197', 'F', 'T', 'U']