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

Input: Consider Input: QKlzsmHyBcC, snPtzsmHdMIv

Output: zsmH


Input: Consider Input: jyJrDIhxJtWbnooEXZ, uyXifNCIhxJtWbnVCUrt

Output: IhxJtWbn


Input: Consider Input: OXfVcewuewwX, SzcewuetSW


Output: cewue