In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['C', 7511, 'A', 3619, 4627, 'y', 'h', 'u', 'P', 'o', 'P', 'b', 'c', 'f', 't', '6249', '6955', 'Q', 7185, 3879, 6859, 9721, 6019, 'o', 1767, 'F'], [969, 4527, 9489, 'b', 7685, 8865, 'y', 'h', 'u', 'P', 'o', 'P', 'b', 'c', 'f', 't', '6249', '6955', 'q', 2547, 5731, 'w', 'w', 8633, 'R', 't', 'Z', 'd', 'L', 'H']