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

Input: Consider Input: sGrHRmELarByxp, cDCUnmELarBXbEfM

Output: mELarB


Input: Consider Input: OVVkkdeHoFlyNROyCP, zFVUJbvkkdeHoFlysF

Output: kkdeHoFly


Input: Consider Input: EBUrUOqPnUTDiwqKMv, zpvGNPnUTDiwNh


Output: PnUTDiw