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

SOLUTION: HhaCEIw

PROBLEM: pqFpUjQGiofBOjfYkRW, pQMnCFlhFpUjQGiofbc

SOLUTION: FpUjQGiof

PROBLEM: kySHbkygDl, cbHbkyzS

SOLUTION:
Hbky