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

Q: ljwjMioOwfOltGBaE, TneNGsoOwfOlxnWWW

A: oOwfOl
****
Q: gTjTwC, OUjTgM

A: jT
****
Q: irpmwsCjrMnaXf, DFSXpmwsCjDtSJZj

A:
pmwsCj
****