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

Q: fBpRXPkikQokGVeS, FwUbKXkikQokGos

A: kikQokG
****
Q: ljwjMioOwfOltGBaE, TneNGsoOwfOlxnWWW

A: oOwfOl
****
Q: IEPJwNvwrJh, axRQwNvwxTc

A:
wNvw
****