In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[9091, 8811, 7791, 'u', 8817, 'M', 'F', 'H', '6123', 'a', '9975', 'a', '5025', 'l', 'I', '7127', '7801', '8587', '1705', '4819', 'y', 'j'], ['G', 'x', 4915, 9827, 'Q', 'f', 9417, 6117, 607, 'X', 2317, '6123', 'a', '9975', 'a', '5025', 'l', 'I', '7127', '7801', '8587', '1705', '4819', 'u', 3999, 'P', 7217, 'j', 'F', 'E', 7675]