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

XpFCxFOgTTNCnQzMnVPV, FMqzdOwgTTNCnQzedorxVPe
gTTNCnQz

FgQsxN, UMQsIa
Qs

ZZoRniOXV, fIoRniaNRt

oRni