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

Q: nOfXJySmVaJIindcJavXh, YpJWmVaJIindcJnoxyRvunG

A: mVaJIindcJ
****
Q: CxosNa, ikosdx

A: os
****
Q: XiVjgU, WOVjcM

A:
Vj
****