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

cCDTMXjGMNikONun, jpcMXjGMNizBEWQzT
MXjGMNi

BVipiZoGXaWdjmDsxWP, yxppsiYkiZoGXaWdjoDRuKW
iZoGXaWdj

MmUfyZ, EGUfiw

Uf