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: dxqZUOvRprXyFfjQfTWBhR, biSVjOvRprXyFfDtuFWQ

Answer: OvRprXyFf


Question: iYuUgULgqcAgd, kRNUgULgqFv

Answer: UgULgq


Question: BWAZAIJDseyFngzLndRw, KcwNYUAIJDseyFotQslTF

Answer:
AIJDseyF