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: rcKVmDzwJKeK, uYqmDzwJKxkGi

Answer: mDzwJK


Question: MSxTzCpiJAplpzSvLlNJS, oScCpiJAplpNVrqkn

Answer: CpiJAplp


Question: HtlXgfVakzTa, XsLsXgfVajV

Answer:
XgfVa