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

SOLUTION: zMtYsfVLda

PROBLEM: ATmVEtUuZOgsBUuL, UMUuZOgsBPVT

SOLUTION: UuZOgsB

PROBLEM: UWsHTXbnBFsbMKuUTRvbJSrt, aKaAGQjNvbnBFsbMKuQeVaqr

SOLUTION:
bnBFsbMKu