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

Input: Consider Input: AxAmDG, LTAmEV

Output: Am


Input: Consider Input: BmwpAnWJ, klVwpAFw

Output: wpA


Input: Consider Input: OAglOXbmuADnVVPVI, IgXbmuADjM


Output: XbmuAD


