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

SOLUTION: exXGlpB

PROBLEM: hCRsCCOoLMpjXwI, lVRCOoLMpxaYFbY

SOLUTION: COoLMp

PROBLEM: fAsWQxuyBevvLogrSrgg, tmdBEUxuyBevvLogXjiMCbh

SOLUTION:
xuyBevvLog