In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['i', 'C', 'p', 'L', 'N', 'T', '7121', 'G', '9827', 't', '1829', 'E', '7753', 's', 'M', '4509', '7871', '9967', '4159', 's', '4005', 'T', '2917', '4683', 'f', 'Z', 3471, 'L', 4017, 'c', 3457, 'b', 5883, 5959, 6337, 'X', 'B', 4043, 'A', 5137], ['W', 'f', 'O', 1293, 'M', 'z', 'f', 'T', '7121', 'G', '9827', 't', '1829', 'E', '7753', 's', 'M', '4509', '7871', '9967', '4159', 's', '4005', 'T', '2917', '4683', 'a', 6799, 5265, 'A', 'r', 6783, 'z', 'Y', 'k', 8301, 5263, 'z', 's', 'j', 9195]