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

SOLUTION: GBRpwc

PROBLEM: wrVsKN, mOVsWo

SOLUTION: Vs

PROBLEM: pLhDtVlGzj, qPqRwDtVlGnEG

SOLUTION:
DtVlG