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

SOLUTION: DnZqSu

PROBLEM: HKqfdEvqDuGhWByFlzIEeYh, VVaZfkLCMuGhWByFlzIOZaXbMCA

SOLUTION: uGhWByFlzI

PROBLEM: sPUcMlMwjxqQlSMrzhzSkwj, dDlMwjxqQlShbSzoys

SOLUTION:
lMwjxqQlS