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

SOLUTION: AyruPTTHW

PROBLEM: ssKUiWgGqsXYlFOOc, JDcVTmCgGqsXYlxYE

SOLUTION: gGqsXYl

PROBLEM: YtMldLcxjIdpCq, FtwvEEMldLcxjIPYYhQANV

SOLUTION:
MldLcxjI