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: XqyPjqNZDEK, EfwPjqNgjIP

Answer: PjqN


Question: wrVsKN, mOVsWo

Answer: Vs


Question: QywlrrWhbzS, DbljirlrrWhbOkk

Answer:
lrrWhb