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

Input: Consider Input: IVnbnqBqdPcXfHotUzCYoaGQy, PAlyypBRRBqdPcXfHotpZs

Output: BqdPcXfHot


Input: Consider Input: NmtypJ, tQtyZD

Output: ty


Input: Consider Input: fpYPwiiVVZWQdTouip, lBYPwiiVVZWQAUE


Output: YPwiiVVZWQ