In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['I', 3281, 'A', 8923, 1201, 'k', '5251', '7009', '5993', 'c', '707', '283', 'p', 'h', '7619', 'J', 2897, 5181, 'C', 'W', 't'], ['Z', 5365, 'k', '5251', '7009', '5993', 'c', '707', '283', 'p', 'h', '7619', 'z', 7715, 'l']