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

Q: TUAHhdvHIBxogI, LjfGsAHhdvHJcSdNV

A: AHhdvH
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Q: yITbYie, TlqTbYomH

A: TbY
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Q: lYtbsleMIKsrAShlSBehhTd, bkfnbZndWKsrAShlSBwzbAOE

A:
KsrAShlSB
****