In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[2975, 3781, 'D', 'd', 'K', 4033, '3783', 'n', 'k', '327', 't', '9871', '233', 's', 'e', 'P', 3411, 'J', 'e'], [4339, 2811, '3783', 'n', 'k', '327', 't', '9871', '233', 'l', 'f', 4263, 7913]