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: SQNzngllNbOkKDK, MijfNzngllNDfWge

Answer: NzngllN


Question: oWwqraAz, uxTqraonu

Answer: qra


Question: OVCCqFJCjniPFRleUGpn, YhXetrGnjniPFRleereeHi

Answer:
jniPFRle