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: OUNqomxFcLXhWdfB, gdqomxFcLHQPCu

Answer: qomxFcL


Question: TTagIJmzrOTdnKr, UONmtdHJmzrOTduWo

Answer: JmzrOTd


Question: AjRwnRTvnCITrolwNotD, KXMwnRTvnCITQXaQOeJ

Answer:
wnRTvnCIT