In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[4875, 9049, 6189, 's', 2909, 'g', '4035', '5015', 't', '4561', '9233', 'A', '3115', '9481', 'h', '699', 's', 'K', 'H', 2137, 4405, 2779, 8047, 'A', 899], ['C', 'G', 'G', 'B', '4035', '5015', 't', '4561', '9233', 'A', '3115', '9481', 'h', '699', 's', 'K', 'U', 2199, 'V', 7657, 1265, 'R', 665, 1151]