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

Q: WjyKtxKtEYjP, vuBZJZyKtxKtXRZs

A: yKtxKt
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Q: wXGerDNhSNnCCedyzskswVnh, BfFNhSNnCCedybrUbI

A: NhSNnCCedy
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Q: andNlOdIcQMyZvc, vCMENolkslOdIcQMyZJtCFo

A:
lOdIcQMyZ
****