In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

[Q]: WlqGjLNrxXeUrKCZel, pDSsmNrxXeUrKCslBXBbRu
[A]: NrxXeUrKC


[Q]: wCfNCfxvLRAxBstRTwMSqTn, AhwxfFNCfxvLRAxBrNtf
[A]: NCfxvLRAxB


[Q]: maUPbxCcFJkpEsxaAMq, iOlkmWcFJkpEsxaXrELmu
[A]:
cFJkpEsxa