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

SOLUTION: lMs

PROBLEM: gfXPLNzsyfEotmHL, oJeXPLNzsyJuXP

SOLUTION: XPLNzsy

PROBLEM: AOIdqCWHWgCMqSKyCV, BFcIcFHWgCMqSKyHt

SOLUTION:
HWgCMqSKy

