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

SODsrWUjUBSgA, WIWUjUBCUUs
WUjUB

kIBDjQLEZepVNHqnKqhine, hTZepVNHqnYTajyzv
ZepVNHqn

DMXrDmJQOeHsdCsIDCgoBWs, ZYrDmJQOeHsdfcjhRZ

rDmJQOeHsd