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

Input: Consider Input: EOwHDdhJcP, DrIuDdhJYw

Output: DdhJ


Input: Consider Input: jsXHot, gtXHmB

Output: XH


Input: Consider Input: RZSFEsxSTDabLrUV, vFYBDEsxSTDaZM


Output: EsxSTDa