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: mmDhYqPJC, qThYqxW

Answer: hYq


Question: FiKGCRXutEOzMqP, xdxRXutEsl

Answer: RXutE


Question: IZiLwrAsWWwhKIimwJLyJItE, WsnHjwhKIimwJLyYzAIiPf

Answer:
whKIimwJLy