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

SOLUTION: uxDDGkf

PROBLEM: BUvWkxrAvDQG, rHrkxrAkCE

SOLUTION: kxrA

PROBLEM: JIMMKkzXvGeZXTMYGDcbmhLp, XCRrhXvGeZXTMYiHuUveB

SOLUTION:
XvGeZXTMY