Teacher:In this task, you are given two lists A,B. Find the longest common subsequence in the lists A and B.
Teacher: Now, understand the problem? Solve this instance: ['z', 'D', '2663', '9937', 'G', 'n'], [6979, 'l', '2663', '9937', 'J', 'b']
Student:
2663, 9937