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

yPODMimvyQPYWHfcM, aZiotMimvyQPZncH
MimvyQP

umXfmRnUgALpFAqBaKfNfo, aOAXWnUgALpFAqBmNpTCdj
nUgALpFAqB

bKjbTYHy, nmljbTAsQ

jbT