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

SOLUTION: BRA

PROBLEM: sdGIVJPsWWszKPCGk, ghRJPsWWszKcJUg

SOLUTION: JPsWWszK

PROBLEM: HVUzqjLSfkTXZ, yebVbizqjLSfsFLd

SOLUTION:
zqjLSf