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

NmtypJ, tQtyZD
ty

sdGIVJPsWWszKPCGk, ghRJPsWWszKcJUg
JPsWWszK

dEEBlIqzKPT, tDBlIqCHza

BlIq