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: XMtSwZVAHsNYhbyDm, asAVAHsNYhSPuNLrV

Answer: VAHsNYh


Question: zqwhMdAdXQfQCAmVNaYZm, toYMIwQeadAdXQfQCAmLyheFOv

Answer: dAdXQfQCAm


Question: AqIFouPBi, TLFouQoM

Answer:
Fou