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

Q: VRXUhOYfTul, JqZUhOYKq

A: UhOY
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Q: bSBuJiZniSlZtO, AcuJiZniSRAOAv

A: uJiZniS
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Q: TgaKfVndTA, admaKfVXTMv

A:
aKfV
****