TASK DEFINITION: In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
PROBLEM: aIZIsqL, wxSZIsEnO

SOLUTION: ZIs

PROBLEM: SyweIt, ILweip

SOLUTION: we

PROBLEM: DnAzbgMtdPKsNCMpBfc, QdfXRkWREzbgMtdPKsGx

SOLUTION:
zbgMtdPKs