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

vhZuXCsIkQR, YflCuXCsIkLu
uXCsIk

BdqUloJanutXoOyfLsuA, NRDloJanutXoOQY
loJanutXoO

eUZiBPsYfhAelUqAVyG, UlMVLPsYfhAelXd

PsYfhAel