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

SOLUTION: dAdXQfQCAm

PROBLEM: kyADtWLlnmYv, tcaKvDtWLlnvBq

SOLUTION: DtWLln

PROBLEM: odgafrieL, OyafrMB

SOLUTION:
afr