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

Input: Consider Input: JKZiYILNeNQbJyznES, PHKILNeNQbJylltYH

Output: ILNeNQbJy


Input: Consider Input: DwLGzwYOWjtzIunE, TTViSbkwYOWjtzNqUOOz

Output: wYOWjtz


Input: Consider Input: lbiwoamlp, xniwoafb


Output: iwoa