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

SOLUTION: ASwuw

PROBLEM: lsNwypFwhKP, diEfLwypFwEKqCN

SOLUTION: wypFw

PROBLEM: ptVlCwpfOZIi, QEdyVlCwpfOwp

SOLUTION:
VlCwpfO