In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
--------
Question: FNVeaFmprNHqqtAaKv, iGBmrrMveaFmprNHqWWAvtht

Answer: eaFmprNHq


Question: BdqUloJanutXoOyfLsuA, NRDloJanutXoOQY

Answer: loJanutXoO


Question: AoPVODspyQGPJSKfq, ollshGODspyQGlIiL

Answer:
ODspyQG