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

SOLUTION: os

PROBLEM: RwduMBkDazrwZP, UPzcwtWMBkDazrAw

SOLUTION: MBkDazr

PROBLEM: cpPUYUbxSWIKTqVPbNhU, VRyUbxSWIKTqzOUA

SOLUTION:
UbxSWIKTq