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

SOLUTION: nRdwwlnt

PROBLEM: VRXUhOYfTul, JqZUhOYKq

SOLUTION: UhOY

PROBLEM: zytPTpLAQZEDP, cItPTpLAYFsrDK

SOLUTION:
tPTpLA