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: mQvintdwLUpClREgxv, rYnoXBtdwLUpClRwxsqX

Answer: tdwLUpClR


Question: ahPbomjSH, rBbomynK

Answer: bom


Question: kUXCabnA, UhXCaPPU

Answer:
XCa