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

SOLUTION: tN

PROBLEM: fAsWQxuyBevvLogrSrgg, tmdBEUxuyBevvLogXjiMCbh

SOLUTION: xuyBevvLog

PROBLEM: ZmbchgdLyQIcRF, IqgdLyQIcINPGcgQ

SOLUTION:
gdLyQIc