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

SOLUTION: UKLTNLJbMK

PROBLEM: VTwtMVKmrRvL, WLoVtWtMVKmrDCke

SOLUTION: tMVKmr

PROBLEM: MsJGGoGVGTGVQKONBjs, ZeGoGVGTGVtj

SOLUTION:
GoGVGTGV