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

SOLUTION: hzyYiPoO

PROBLEM: mJoHBJehHtkFS, ZMrDxHBJehHtxS

SOLUTION: HBJehHt

PROBLEM: vhbGVspYtxCfDwXmjq, sdCGspYtxCfwRAxsP

SOLUTION:
spYtxCf