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

SOLUTION: Gc

PROBLEM: haOsaSQcyodWhqQaC, BKLEUQcyodWhvVkmxBz

SOLUTION: QcyodWh

PROBLEM: bgAUkZtjSLloBQmOf, xswFLuikZtjSLlaM

SOLUTION:
kZtjSLl