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

Q: cjDuPZOHjystHnF, okWVdUDuPZOHjSCaEecP

A: DuPZOHj
****
Q: esIMEOgV, tNIMEybb

A: IME
****
Q: JUAVmB, KlAVLi

A:
AV
****