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

SOLUTION: eTSNsHYpBK

PROBLEM: LJJvLTK, jpFJvLqh

SOLUTION: JvL

PROBLEM: fPVoYtuxitSlXKymhe, txtRYtuxitSlPvx

SOLUTION:
YtuxitSl