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

Input: Consider Input: OYERnjubLFovtcS, FngzQJVGERnjubLFafmzq

Output: ERnjubLF


Input: Consider Input: yQRDycTycwH, ImycTycrR

Output: ycTyc


Input: Consider Input: OqPsNbcdNKNLp, iJdtPsNbcdNKRos


Output: PsNbcdNK