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

eNuawupVqQ, RIawuplUIf
awup

RyaNyUvXAaZHLXUtYuz, CkbsWxZyUvXAaZHLXJJzugDy
yUvXAaZHLX

tpxuSleZTujWC, eeVopuSleZHFDto

uSleZ

