In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[6183, 4797, '4489', 'H', '1839', 'C', '5943', 'D', '2243', 'v', 'R', '2369', '653', 'Z', '4951', 'o', '5709', 'E', '6715', 'E', 'O', 'd', '9889', 'I', 'L', 'f', 2015], ['U', 'Z', 'q', 583, 'T', 'L', 5311, 'L', 't', 'A', 'W', 6061, 9623, 'x', '4489', 'H', '1839', 'C', '5943', 'D', '2243', 'v', 'R', '2369', '653', 'Z', '4951', 'o', '5709', 'E', '6715', 'E', 'O', 'd', '9889', 'I', 'q', 'X', 9877, 8877, 'R', 5899]