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

[Q]: aeQjEeiWGONmzGimhGiw, RIEeiWGONmOZuVYr
[A]: EeiWGONm


[Q]: kIBDjQLEZepVNHqnKqhine, hTZepVNHqnYTajyzv
[A]: ZepVNHqn


[Q]: fOTDNhLOYavlbJTMEO, tFUwhLOYavlZZnggSA
[A]:
hLOYavl