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

SOLUTION: bi

PROBLEM: ZyrpGdXvvtrKQIxU, CLNGdXvvtrKQDpicfqLdt

SOLUTION: GdXvvtrKQ

PROBLEM: HfAnojaUOipAmMEheXQA, JraUOipAmMxEpn

SOLUTION:
aUOipAmM