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

Q: ZKMRTxCxbsbX, iovHrMRTxCxbsjv

A: MRTxCxbs
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Q: JqdTDnZqSuSVcMsx, TEtDDnZqSuZa

A: DnZqSu
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Q: bjjsMtBzzXIgYWPBZmaDL, iTxktmvBzzXIgYWPhbAyBE

A:
BzzXIgYWP
****