In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['p', 1467, 'C', 'c', 2089, 'U', '8995', 'H', 'T', '4937', 'y', 't', 'P', 'H', 'G', 4277, 'W'], [2295, 1935, 'R', 2969, 'r', 3033, '8995', 'H', 'T', '4937', 'y', 't', 'P', 'H', 'o', 'G', 671, 5971, 3703]