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

Q: BdqUloJanutXoOyfLsuA, NRDloJanutXoOQY

A: loJanutXoO
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Q: bUHPpvVtFQNSpUdg, zggEFoKBHPpvVtFQNHXsc

A: HPpvVtFQN
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Q: hYKNIrciOkoW, ooINIrciOkTXXkL

A:
NIrciOk
****