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

SOLUTION: kWLUJ

PROBLEM: fAsWQxuyBevvLogrSrgg, tmdBEUxuyBevvLogXjiMCbh

SOLUTION: xuyBevvLog

PROBLEM: uGDJixAmSiVaFRmfKRM, NsTGxsJixAmSiVageSw

SOLUTION:
JixAmSiVa