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

SODsrWUjUBSgA, WIWUjUBCUUs
WUjUB

nxoXDohHr, WcbkXDohFbJ
XDoh

XvnuwuVzciu, aynuwuVzSDix

nuwuVz