In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
[3547, 2467, 'k', '5819', 'A', '7079', '3267', '4975', 'Y', '6937', 'J', 'N', '1263', '3595', 'H', 'M', '4941', 'w', '847', 'm', 'R', 'z', 'V', 793, 'D', 'R', 'Z', 'U', 4069], ['H', 'G', 2617, 'U', 'S', 1079, 'I', 'E', 1579, 'F', 5073, 'I', 7679, 8437, '5819', 'A', '7079', '3267', '4975', 'Y', '6937', 'J', 'N', '1263', '3595', 'H', 'M', '4941', 'w', '847', 'm', 'S', 1889, 'Z', 4971, 'A', 'X', 9643, 5607, 'S']