In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[7957, 'U', 'I', 'a', 5191, 'P', 'Q', 'M', 'r', 'H', 'T', 'L', '3029', 'A', '9927', 'u', '9327', '7819', 'j', 'u', '4071', '3099', '4579', '2673', '9509', '4077', '2497', '7357', '1761', 'l', '3829', 'D', 'w', 'W', '6331', '3829', '8731', 'U', 't', 'X', 'w', 'Q', 1389, 6791, 6293, 'a', 103], ['a', 4047, 4661, 569, 3241, 3841, 8041, 4131, 7405, 4089, 'f', 801, 'o', 8023, 'e', 'n', 'v', 8563, 'Y', 8469, 'T', 1029, 2789, 9877, 1521, 3833, 'H', 'T', 'L', '3029', 'A', '9927', 'u', '9327', '7819', 'j', 'u', '4071', '3099', '4579', '2673', '9509', '4077', '2497', '7357', '1761', 'l', '3829', 'D', 'w', 'W', '6331', '3829', '8731', 'U', 'J', 'E']