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

SOLUTION: DGr

PROBLEM: QqtCFzXHPNFXx, XECFzXHPSGwUuk

SOLUTION: CFzXHP

PROBLEM: SbyowrkpFLsrFBOMn, oZowrkpFLsrmSzcCdPOG

SOLUTION:
owrkpFLsr