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

SOLUTION: MpQyanUT

PROBLEM: SFQHJlK, dHfQHJoUC

SOLUTION: QHJ

PROBLEM: PyFyuWWbIXMFAZU, GSLuWWbIXMPCft

SOLUTION:
uWWbIXM

