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

Q: fREVIdeTcakgFnwDWTVev, IbtXImseeTcakgFnwDYsKBAlux

A: eTcakgFnwD
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Q: pBDnbfrAxJfVhPBxheXZGp, LMtorAxJfVhPnnaed

A: rAxJfVhP
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Q: vBMYKQFWjVDAnzFKcO, ITmKQFWjVDAnzIt

A:
KQFWjVDAnz
****