In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
['b', 2531, 4877, 'L', 'm', 7939, 'W', 9319, 587, 2797, 771, 'm', 'J', 4861, 6745, 'c', 'Z', 'K', 'N', 5435, 'm', 'U', 1739, '7187', 't', 'B', '1089', 'H', '799', '4555', 'w', 'W', '5747', '3215', '9203', 'x', 'u', 'z', '9749', 'V', '1677', '1053', 'H', '1917', 'z', 'V', 'D', 's', 'Q'], [6913, 'N', 8393, '7187', 't', 'B', '1089', 'H', '799', '4555', 'w', 'W', '5747', '3215', '9203', 'x', 'u', 'z', '9749', 'V', '1677', '1053', 'H', '1917', 'z', 'V', 'D', 'G', 1713, 'm', 557, 'h', 7619, 8837, 'S', 'u', 4677, 1797, 'e', 5989, 'C', 'W']