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: iJbjApY, ggwbjAws

Answer: bjA


Question: AxAmDG, LTAmEV

Answer: Am


Question: KTAFonizDqCVvucpJWrItdw, rfFonizDqCVvYbGhb

Answer:
FonizDqCVv