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

[Q]: YKpdeJQhzyYiPoODACUu, mjmnIlCehzyYiPoOzZ
[A]: hzyYiPoO


[Q]: lMRuEThD, wqQRuEKp
[A]: RuE


[Q]: bhJEQohIHycSxDHOvDqA, GeRQYnihIHycSxDaD
[A]:
hIHycSxD