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

SOLUTION: qra

PROBLEM: iaXeqfIrYKxPJRXxfSm, rIYKxPJRXxfsjVsqe

SOLUTION: YKxPJRXxf

PROBLEM: kYSDgSCShXa, yVgSCSoAV

SOLUTION:
gSCS