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: sGrHRmELarByxp, cDCUnmELarBXbEfM

Answer: mELarB


Question: iJbjApY, ggwbjAws

Answer: bjA


Question: VuOQEsFkQSH, HtOQEsFkQqP

Answer:
OQEsFkQ