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: BmxgSFWBlVX, kGgKrgSFWBlGunFcZ

Answer: gSFWBl


Question: hVQJkZyKfPoOQEukfAbXDpB, qpojyxWkZyKfPoOQEZkUI

Answer: kZyKfPoOQE


Question: MGngNZhVUpB, clLeNZhVop

Answer:
NZhV