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

SOLUTION: bcBoWdAIya

PROBLEM: Owbiay, exbime

SOLUTION: bi

PROBLEM: wRFDMvQmLqaZwAhn, nizUXTvQmLqaYIGvS

SOLUTION:
vQmLqa