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

SOLUTION: kMfARxWBS

PROBLEM: WlqGjLNrxXeUrKCZel, pDSsmNrxXeUrKCslBXBbRu

SOLUTION: NrxXeUrKC

PROBLEM: esIMEOgV, tNIMEybb

SOLUTION:
IME