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: RwduMBkDazrwZP, UPzcwtWMBkDazrAw

Answer: MBkDazr


Question: vMsEJRoLkWcmkuwNRz, ZmoLkWcmVZiBv

Answer: oLkWcm


Question: DiaIlIQP, guaIlISVut

Answer:
aIlI