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

oDdulHNcCdgbRGxiBTxM, kDcCdgbRGnsJlvas
cCdgbRG

OVZxWYzAAxG, rStOxWYzJeoC
xWYz

aIZIsqL, wxSZIsEnO

ZIs

