In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['z', 9605, 't', 'P', 3519, '5139', '9043', '3255', 'f', '9209', 'n', 'h', 'G', 't', 9837], ['w', 9387, 7855, 'C', 7735, 'F', 'i', 'H', '5139', '9043', '3255', 'f', '9209', 'n', 'h', 'G', 'k', 'a', 'p', 9701, 9947, 8389]