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

oWwqraAz, uxTqraonu
qra

sRTQgRgRUjEooapKdR, vzsBgRUjEooLBkYeH
gRUjEoo

kGgsDkFImbLoxzOMMKt, YzeICkFImbLoITi

kFImbLo