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

sOSXbnluNuvwMETKda, JzXbnluNuvyeVHO
XbnluNuv

fCGEhfHvcRouHzNw, gtjBkhfHvcRouHee
hfHvcRouH

zisfhsjpqVZhkWM, jHAtmhsjpqVZhkKMCNSNPiu

hsjpqVZhk