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

SOLUTION: JoKSOAuV

PROBLEM: fdinRdwwlntwqzYGhV, ZefonRdwwlntoWQbh

SOLUTION: nRdwwlnt

PROBLEM: hXetVNELXEmUpQWWrSQsRvZZ, OKKLpVNELXEmUpQhyFAROS

SOLUTION:
VNELXEmUpQ