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

elloYaejTczBiiNOU, XoCPzloYaejTcXYtKODL
loYaejTc

tGBRASi, QABRAtL
BRA

aUFiIJUn, fYyiIJhlY

iIJ