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

aBlALASwuwTZmy, MdwASwuwIW
ASwuw

sdGIVJPsWWszKPCGk, ghRJPsWWszKcJUg
JPsWWszK

rJtTwVAeCQ, oGHgTwVAeoTX

TwVAe