In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['b', 'h', 7259, 'x', 3369, 7121, 2693, 'R', 'e', 'g', 'h', 'L', 6025, 1993, 359, 7141, 'i', 'J', 5595, '2155', 'N', 'x', '8695', '3551', '913', 'H', 'i', 'I', 'U', 'h', '4107', 'x', '211', 'W', '5325', '3457', '7925', '6677', '4135', 'c', 9249, 7975, 8419, 8321], [7855, 841, 7, 'p', 9085, 6399, 'D', 'G', 5341, 'Q', 2165, '2155', 'N', 'x', '8695', '3551', '913', 'H', 'i', 'I', 'U', 'h', '4107', 'x', '211', 'W', '5325', '3457', '7925', '6677', '4135', 'D', 7643, 8501, 'd', 6919]