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

SOLUTION: BuMdiZ

PROBLEM: lrBJDRkT, jmBJDrI

SOLUTION: BJD

PROBLEM: VzLVfJg, wyjLVfpF

SOLUTION:
LVf