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

SOLUTION: JPsWWszK

PROBLEM: rCFrfkmXbSHK, mztfkmXwez

SOLUTION: fkmX

PROBLEM: vceqKmzD, hpqKmTL

SOLUTION:
qKm