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

SOLUTION: VTG

PROBLEM: XpFCxFOgTTNCnQzMnVPV, FMqzdOwgTTNCnQzedorxVPe

SOLUTION: gTTNCnQz

PROBLEM: OaCzLCQjaxqljaBQyGDOVPcn, EhfJoLFeaxqljaBQibS

SOLUTION:
axqljaBQ