In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

Q: zqwhMdAdXQfQCAmVNaYZm, toYMIwQeadAdXQfQCAmLyheFOv

A: dAdXQfQCAm
****
Q: AxRSlkQfWHrdlgQG, iXIOrmlkQfWHTy

A: lkQfWH
****
Q: cOgJRlgWUOEPqmrqeQqP, cNUOEPqmrqIzZvNE

A:
UOEPqmrq
****