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

Input: Consider Input: EJZYVxgFxPoOSDlLfK, uTLTIETHZYVxgFxPoPwr

Output: ZYVxgFxPo


Input: Consider Input: cxYVucnmEQopeWHrPJ, jNnOaYVucnmEQoSE

Output: YVucnmEQo


Input: Consider Input: BPlchqhmOLRSvdQ, xKDhmOLRSvRmjL


Output: hmOLRSv