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

SOLUTION: sJcq

PROBLEM: XZslQqrShfCXRXyHrFVq, BtOQgQqrShfCXRRCRbMvXPM

SOLUTION: QqrShfCXR

PROBLEM: TzInZANDDWOWoBnEUHUP, iejANDDWOWocyXHKOua

SOLUTION:
ANDDWOWo