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

Input: Consider Input: QjDQjzAIsnYgNmmetl, vyqDQjzAIsnNajYEheP

Output: DQjzAIsn


Input: Consider Input: GFhJafTV, waHhJaji

Output: hJa


Input: Consider Input: GaWUURIXOYjtz, MzQcRIXOYjoA


Output: RIXOYj