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

Answer: MimvyQP


Question: GnElFKBIoYmAdvz, GrElFKBIoMo

Answer: ElFKBIo


Question: kThKsjVvcBReQLwOAmf, RwydyrJQWVvcBReQLwOmP

Answer:
VvcBReQLwO