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

SOLUTION: Lw

PROBLEM: gHFwDorPbNPORVgdLW, AfqDQvCGFwDorPbNPVPVmbQ

SOLUTION: FwDorPbNP

PROBLEM: hCMslcJEttrgbEXSryH, noDVKjlslcJEttrgvHNNSprJD

SOLUTION:
slcJEttrg