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

Input: Consider Input: nxoXDohHr, WcbkXDohFbJ

Output: XDoh


Input: Consider Input: UysTOtIRtRorNAFKKYD, icDOtIRtRoropYVaKzJ

Output: OtIRtRor


Input: Consider Input: zpmZnnvMXYeqMmLg, MPmZnnvMXYemODaITY


Output: mZnnvMXYe