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

XEvxzelZaWRO, zXIelZaWBUn
elZaW

koddLvYmRXDUuUnW, GnqDYGmmRXDUuUquAnf
mRXDUuU

MIiYjjQXv, mzhYjjHx
Yjj