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: kvutZfcPKzHE, kTKutZfcPTGmU

Answer: utZfcP


Question: RwqzMTeLMdPx, qaWtYhqzMTeLMdHbWDT

Answer: qzMTeLMd


Question: XkYoWjnVViPl, WJoWjnVpYUXZ

Answer:
oWjnV