In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['a', 'W', '7467', '7377', 'T', 'Z', 'O', 'm', 'a', '6355', '4613', 'R', '311', '3511', '1331', '8415', '6283', 'b', 'q', 'J', 'V', 203, 6535, 'o', 3403, 'K', 't', 7823, 5203, 'X'], [5617, 'I', 5715, 1395, 1959, 'n', 'L', 'y', 'O', 'Q', 'o', 'L', 1665, 7045, 'y', '7467', '7377', 'T', 'Z', 'O', 'm', 'a', '6355', '4613', 'R', '311', '3511', '1331', '8415', '6283', 'b', 'q', 'J', 'p', 'G']