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: VTwtMVKmrRvL, WLoVtWtMVKmrDCke

Answer: tMVKmr


Question: DhhYhrqVMXSoyvXQwqPKzWARAP, CaMXSoyvXQwqcDDtMsVqD

Answer: MXSoyvXQwq


Question: riSXVwgaBsPVut, CJqpYdJVwgaBsPDesLxw

Answer:
VwgaBsP