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

SOLUTION: qwgmqGIAG

PROBLEM: SIIPePlrkftKkzfgdjg, JqNnXHrkftKkzOMUwmc

SOLUTION: rkftKkz

PROBLEM: PIiDXhJhbnJy, uXUCKciDXhJhSAQ

SOLUTION:
iDXhJh