In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[787, 577, 1283, 10019, '3229', 'C', 'b', '8319', 'j', 7553, 8091], [4091, 1749, 'L', 'A', '3229', 'C', 'b', '8319', 'U', 9603]