In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[1353, 'U', 8637, 5701, 295, 'e', '5621', '5893', '9729', '3659', '1133', 'U', '123', 'U', '7967', 'N', 'Q', '9243', 'P', 5193, 'k', 'U', 8955, 7953, 'h'], [4251, 9421, 'e', '5621', '5893', '9729', '3659', '1133', 'U', '123', 'U', '7967', 'N', 'Q', '9243', 'q', 'G', 'h', 'u', 'T', 3931, 'k', 4743, 'Z', 't', 'y']