In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[8393, 6443, 9811, 'O', 8975, 7473, 'D', 's', 2105, 9759, 'C', '4049', '285', 'i', 'V', 'd', 'K', '9871', 't', '7395', 'I', 'b', 'W', 'E', 5275, 'G', 5913, 'v', 6355, 'g'], ['f', 'd', 785, 'p', 'w', 'C', '4049', '285', 'i', 'V', 'd', 'K', '9871', 't', '7395', 'm', 'g', 6431, 8361, 'u']