In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['m', 'K', 2769, 'i', 'k', 853, 'P', '9255', 'N', '8281', 'f', 'm', 'V', 'a', 3525, 7823, 2111, 'T'], ['Q', 1337, 'I', 'P', '9255', 'N', '8281', 'f', 'm', 'g', 'M', 3873]