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

SOLUTION: zfc

PROBLEM: VTwtMVKmrRvL, WLoVtWtMVKmrDCke

SOLUTION: tMVKmr

PROBLEM: lVFEfRNbu, evGEfRNWEtd

SOLUTION:
EfRN

