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

SOLUTION: BlJIEBqgh

PROBLEM: QECPAHsg, bUfPAHOWb

SOLUTION: PAH

PROBLEM: MimFpOFqAODppOllTYXCGWna, CgAODppOllTYuyZAEAdHK

SOLUTION:
AODppOllTY