In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9391, 8013, 'a', 9937, 'i', 'L', 1159, 'c', '8389', '8235', '1751', 'l', '7407', '1603', 'b', 'r', 'u', 'B', 'V', '9141', 'J', 'q', 'o', 'a', 'z', 3887, 's', 9209, 'X', 'k', 4517, 1065, 927, 5665, 1953, 1763, 3779, 1877, 's', 29], ['a', 6673, 4419, 959, 's', 5343, 6113, 1287, '8389', '8235', '1751', 'l', '7407', '1603', 'b', 'r', 'u', 'B', 'V', '9141', 'J', 'q', 'o', 'a', 'b', 753]