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

SOLUTION: fxUdowLL

PROBLEM: CiTNsbepy, DFNsbeZl

SOLUTION: Nsbe

PROBLEM: uZSRkFDHsGXNMaggxUn, lTrQKKpsGXNMaggEdSrEX

SOLUTION:
sGXNMagg