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

Input: Consider Input: yrIDSuVuQU, UXTSuVuLcch

Output: SuVu


Input: Consider Input: GHdeqnuYnQ, zzQeqnutAZ

Output: eqnu


Input: Consider Input: PayMkZxshcfOsZ, ZjPMeZxshcfEXmbt


Output: Zxshcf