In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['w', 1709, 'q', 7369, '7887', 'c', '8189', 'B', '9035', '6995', 'l', '8907', '5631', '4251', 'R', 'c', 'h', 6407, 7549, 'f'], [9003, 4355, 9765, 'N', 'u', 8255, 'r', '7887', 'c', '8189', 'B', '9035', '6995', 'l', '8907', '5631', '4251', 'd', 4807, 8037]