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: AeYjeKwZQillzpD, SnqviKwZQillrxuTB

Answer: KwZQill


Question: QaxEaxdouNyyvNAn, wRjWSaxdouNyyrriQiG

Answer: axdouNyy


Question: IpBTpHEijZiycmm, BJvdHtqEBTpHEijZiyoLongoUHcV

Answer:
BTpHEijZiy