In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

Input: Consider Input: CiElmOvTqJGVJkfSaDRzE, EjDJwMyxTvTqJGVJkfluB

Output: vTqJGVJkf


Input: Consider Input: bUcuzFgsdfojVR, IdcuzFgsdMRgtMA

Output: cuzFgsd


Input: Consider Input: affNICUYKAlHBeRlzK, ziYqZCfCUYKAlHBeOrVk


Output: CUYKAlHBe