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

SOLUTION: oTbXIiXDp

PROBLEM: bjjsMtBzzXIgYWPBZmaDL, iTxktmvBzzXIgYWPhbAyBE

SOLUTION: BzzXIgYWP

PROBLEM: hFpNPftTVSv, oFPftTNj

SOLUTION:
PftT